Удаление PercentEncoding не работает

Question

Я получаю этот JSON с сервера. Ничто, кажется, не работает для удаления кодировки процента:

{
   "response_code":0,
   "results":[
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"What does a funambulist walk on?",
         "correct_answer":"A Tight Rope",
         "incorrect_answers":[
            "Broken Glass",
            "Balls",
            "The Moon"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"In past times, what would a gentleman keep in his fob pocket?",
         "correct_answer":"Watch",
         "incorrect_answers":[
            "Money",
            "Keys",
            "Notebook"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"medium",
         "question":"Coca-Cola's original colour was green.",
         "correct_answer":"False",
         "incorrect_answers":[
            "True"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"On a dartboard, what number is directly opposite No. 1?",
         "correct_answer":"19",
         "incorrect_answers":[
            "20",
            "12",
            "15"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"hard",
         "question":"The words "bungalow" and "shampoo" originate from the languages of which country?",
         "correct_answer":"India",
         "incorrect_answers":[
            "Papua New Guinea",
            "Ethiopia",
            "China"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"How many colors are there in a rainbow?",
         "correct_answer":"7",
         "incorrect_answers":[
            "8",
            "9",
            "10"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"medium",
         "question":"Who is a co-founder of music streaming service Spotify?",
         "correct_answer":"Daniel Ek",
         "incorrect_answers":[
            "Sean Parker",
            "Felix Miller",
            "Michael Breidenbruecker"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"easy",
         "question":"Bulls are attracted to the color red.",
         "correct_answer":"False",
         "incorrect_answers":[
            "True"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"medium",
         "question":"You are allowed to sell your soul on eBay.",
         "correct_answer":"False",
         "incorrect_answers":[
            "True"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"hard",
         "question":""Number 16 Bus Shelter" was a child's name that was approved by the New Zealand government.",
         "correct_answer":"True",
         "incorrect_answers":[
            "False"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"easy",
         "question":""Ananas" is mostly used as the word for Pineapple in other languages.",
         "correct_answer":"True",
         "incorrect_answers":[
            "False"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"Five dollars is worth how many nickles?",
         "correct_answer":"100",
         "incorrect_answers":[
            "50",
            "25",
            "69"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"medium",
         "question":"The French word for "glass" is "glace".",
         "correct_answer":"False",
         "incorrect_answers":[
            "True"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"hard",
         "question":"In Scandinavian languages, the letter Å means river.",
         "correct_answer":"True",
         "incorrect_answers":[
            "False"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"medium",
         "question":"What direction does the Statue of Liberty face?",
         "correct_answer":"Southeast",
         "incorrect_answers":[
            "Southwest",
            "Northwest",
            "Northeast"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"easy",
         "question":"How tall is the Burj Khalifa?",
         "correct_answer":"2,722 ft",
         "incorrect_answers":[
            "2,717 ft",
            "2,546 ft",
            "3,024 ft"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"hard",
         "question":"According to Fair Works Australia, how long do you have to work to get Long Service Leave?",
         "correct_answer":"7 years",
         "incorrect_answers":[
            "2 years",
            "8 years",
            "6 months"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"hard",
         "question":"Which product did Nokia, the telecommunications company, originally sell?",
         "correct_answer":"Paper",
         "incorrect_answers":[
            "Phones",
            "Computers",
            "Processors"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"boolean",
         "difficulty":"easy",
         "question":"Dihydrogen Monoxide was banned due to health risks after being discovered in 1983 inside swimming pools and drinking water.",
         "correct_answer":"False",
         "incorrect_answers":[
            "True"
         ]
      },
      {
         "category":"General Knowledge",
         "type":"multiple",
         "difficulty":"medium",
         "question":"Earl Grey tea is black tea flavoured with what?",
         "correct_answer":"Bergamot oil",
         "incorrect_answers":[
            "Lavender",
            "Vanilla",
            "Honey"
         ]
      }
   ]
}  

Например, в третьем элементе вопрос - кока-кола
И есть еще пара. Мне интересно, какой может быть правильный формат кодировки.