Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.

[EX Q]: Sentence1: With a spatula, fold in flour mixture. 
Sentence2: a sifter is used for separating flour.
[EX A]: flour

[EX Q]: Sentence1: Bivalves feed on plankton and nonliving organic matter. 
Sentence2: Clams feed on plankton and nonliving organic matter.
[EX A]: feed

[EX Q]: Sentence1: Ascothoracican barnacles attach to echinoderms or corals. 
Sentence2: corals use pheromones to communicate with each other.
[EX A]:
corals

