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: I have to say for a rat to hold three pounds is pretty impressive. 
 Response 1: That's what I'm saying. Just because he can do that, he thinks he's the greatest rat to walk the earth. 
 Response 2: He said it was Don but I think it was Steve Dons.

Response 1