Given the prompt and a response, classify the them to "yes" if response is "yes, and" type. Otherwise classify it as "no". "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..."). 1 In short, a "Yes, and" is a dialogue exchange in which a speaker responds by adding new information on top of the information/setting that was constructed by another speaker. Note that a "Yes, and" does not require someone explicitly saying 'yes, and...' as part of a dialogue exchange, although it could be the case if it agrees with the description above. There are many ways in which a response could implicitly/explicitly agree to the prompt without specifically saying 'yes, and...'. 

Prompt: He's with me. I'm his guardian. 
 Response: Then I guess all is OK. Sorry for being a nosy nellie.
yes
The prompt is acknowledging the speaker's guardian and this response implies acceptance to that by stating there is no problem. It also adds information to the dialogue exchange by providing an apology. Hence, it should be classified as a "yes, and" response..