Input: Sentence 1: nah so it's sort of an old wife or common folk tales about you know if you're going to have a cat spayed let it go through heat first not true because when they go into heat their uh genetic parts swell up and expand and everything and then once you do take them into surgery it's a little more difficult easier to have them spayed before they even go into heat Sentence 2: You should always wait for heat to happen then spay.
Output: 

 yes