Definition: Given the sentence, generate "yes, and" response. "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...'. 
Input: Well, Miles was out back by the sequoias, and he was conjuring something or saying some strange spells or something.  He's talking all about monsters, and I couldn't tell if what he was saying was real or in my own mind, and I don't know if I can tell a hawk from a handsaw or if I'm going mad and you've got to help me.
Output:
Okay, I think you're definitely insane and I think your dad is, too, but like, this is really interesting out of anything to do right now.  So, like, let's go get Miles.