input: from typing import Dict
  
  def generate_response(question: str, answers: Dict[str, str]) -> str:
      """ Given a question and a dictionary of predefined answers, return the corresponding
      answer if it exists in the dictionary. If the question is not found, return a randomly
      chosen default response.
      >>> generate_response('What is XYZ?', {'What is XYZ?': 'XYZ is a company that provides XYZ services.'})
      'XYZ is a company that provides XYZ services.'
      >>> generate_response('What is ABC?', {'What is XYZ?': 'XYZ is a company that provides XYZ services.'})
      'I am not sure I understand.'
      """
output:     if question in answers:
          return answers[question]
      else:
          default_responses = ["I am not sure I understand.", "Could you please rephrase that?", "I don't have an answer for that."]
          import random
          return random.choice(default_responses)