input: Write a function to extract the names of programming languages with a count greater than a given threshold from the provided data.
  assert extract_languages(data, 10) == ['JavaScript', 'Python', 'C++']
  assert extract_languages(data, 5) == ['JavaScript', 'Python', 'C++', 'Java', 'Go']
  assert extract_languages(data, 18) == ['JavaScript']
output: def extract_languages(data, threshold):
      return [language for language, count in data.items() if count > threshold]