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: Precipitation falls on the windward side of the mountain range. 
Sentence2: Mountains have higher precipitation than adjacent lowlands.
[A]: Precipitation


[Q]: Sentence1: hunting requires seeing prey. 
Sentence2: hunting requires seeing an animal.
[A]: hunting


[Q]: Sentence1: Some insects can use their antennae to detect sound. 
Sentence2: Insects have chemical receptors on their antennae, legs or feet.
[A]:
insects