请列出5位著名音乐家的名字，并以JSON格式返回。
user
{
  "musicians": [
    {"name": "Ludwig van Beethoven"},
    {"name": "Wolfgang Amadeus Mozart"},
    {"name": "Johann Sebastian Bach"},
    {"name": "Frédéric Chopin"},
    {"name": "Pyotr Ilyich Tchaikovsky"}
  ]
}
assistant