input: 
  def extract_verbs(sentence: str) -> list:
      """Extracts and returns the verbs from a given sentence.
      
      >>> extract_verbs("The cat jumped over the moon.")
      ['jumped']
      >>> extract_verbs("She is running and laughing.")
      ['is', 'running', 'laughing']
      """
      import nltk
      tokens = nltk.word_tokenize(sentence)
      tags = nltk.pos_tag(tokens)
      verbs = [word for word, pos in tags if pos.startswith('V')]
      return verbs
  
output:     import nltk
      tokens = nltk.word_tokenize(sentence)
      tags = nltk.pos_tag(tokens)
      verbs = [word for word, pos in tags if pos.startswith('V')]
      return verbs