input: from typing import List
  
  def remove_punctuations(sentences: List[str]) -> List[str]:
      """ Given a list of sentence strings, remove all punctuations from each sentence.
      >>> remove_punctuations(["This is a sample string!", "Hello, world!"])
      ['This is a sample string', 'Hello world']
      >>> remove_punctuations(["Exam: Questions?", "Foo's Bar's Moo's"])
      ['Exam Questions', 'Foos Bars Moos']
      """
output:     import string
      return [sentence.translate(str.maketrans('', '', string.punctuation)) for sentence in sentences]