你能帮我找到一些关于自然语言处理的在线课程吗？请以json格式输出，包含课程名称、提供商和链接三部分。我想要三个推荐。
user
{
  "courses": [
    {
      "name": "Natural Language Processing with Python",
      "provider": "Coursera",
      "link": "https://www.coursera.org/learn/python-nlp"
    },
    {
      "name": "Introduction to Natural Language Processing",
      "provider": "edX",
      "link": "https://www.edx.org/course/introduction-to-natural-language-processing"
    },
    {
      "name": "Advanced Natural Language Processing",
      "provider": "Udacity",
      "link": "https://www.udacity.com/course/advanced-natural-language-processing--ud120"
    }
  ]
}
assistant