input: 
  from typing import Dict
  
  def generate_response(question: str, answers: Dict[str, str]) -> str:
      """ Generate a response for a given question based on predefined answers. If the question
      is not in the predefined answers, return a random response indicating uncertainty.
      >>> 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 are the benefits of using XYZ?', {'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:
          return 'I am not sure I understand.'