input: def generate_response(question: str) -> str:
      """ A simple AI-based chatbot that answers queries about a product or service. 
      It provides specific answers for predefined questions and generates random 
      responses for unknown questions. The chatbot continues to interact with the user 
      until the user types 'Goodbye'.
      Example:
      >>> generate_response('What is XYZ?')
      'XYZ is a company that provides XYZ services.'
      >>> generate_response('What type of products do you offer?')
      'Can you give me more information?'
      >>> generate_response('Goodbye')
      'Goodbye!'
      """
output:     predefined_responses = {
          'What is XYZ?': 'XYZ is a company that provides XYZ services.',
          'What type of products do you offer?': 'We offer a variety of products including ABC, DEF, and GHI.',
          'How can I contact you?': 'You can reach us at contact@xyz.com or call us at +1234567890.',
          'Goodbye': 'Goodbye!'
      }
  
      if question in predefined_responses:
          return predefined_responses[question]
      else:
          import random
          random_responses = [
              "I'm not sure, can you provide more details?",
              "That's an interesting question, but I don't have the answer right now.",
              "Let me look into that for you.",
              "Can you rephrase your question?"
          ]
          return random.choice(random_responses)