input: from typing import List
  
  import nltk
  
  def extract_verbs(sentence: str) -> List[str]:
      """ Given a sentence, extract and return a list of verbs.
      >>> extract_verbs("The cat jumped over the moon.")
      ['jumped']
      >>> extract_verbs("She walks to the store every day.")
      ['walks', 'store', 'day']
      """
      tokens = nltk.word_tokenize(sentence)
      tags = nltk.pos_tag(tokens)
      verbs = [word for word, pos in tags if pos.startswith('V')]
      return verbs
output:     tokens = nltk.word_tokenize(sentence)
      tags = nltk.pos_tag(tokens)
      verbs = [word for word, pos in tags if pos.startswith('V')]
      return verbs