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.

[Q]: Sentence1: poisonous darts are used for defense by sea anemones. 
Sentence2: poisonous darts are used for protection by sea anemones.
[A]: anemones


[Q]: Sentence1: Endospores are commonly found in soil and water. 
Sentence2: Dirt is really misplaced soil.
[A]: soil


[Q]: Sentence1: Most carcinogens cause cancer by producing mutations in DNA. 
Sentence2: Jet fuels mutate organisms.
[A]:
mutations