Definition: "Yes, and" is a rule-of-thumb in improvisational comedy that suggests that a participant in a dialogue should accept what another participant has stated ("Yes") and then expand on that line of thought or context ("and..."). Given a prompt and two responses, identify which response is the type of "yes, and". Indicate your answer by 'Response 1' if the first response is correct, otherwise 'Response 2'.  Note that a "Yes, and" does not require someone explicitly saying 'yes, and...' as part of a dialogue exchange.
Input: Prompt: How are they still alive? You said they'd be dead by now. 
 Response 1: It defies all scientific explanation, sir. They should have been dead a long time ago. 
 Response 2: It has meant something to me. I've become fond of you over the years. You've become a real friend to me, Beatrice.

Response 1