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: Some herbivores have more than one stomach. 
Sentence2: Camels are an herbivore.
[A]: herbivores


[Q]: Sentence1: the emission of sulfur dioxide causes acid rain. 
Sentence2: the emission of sulfur dioxide causes soil weathering.
[A]: causes


[Q]: Sentence1: Neutrinos are produced in some nuclear reactions in stars. 
Sentence2: Neutrinos cause stars to produce light.
[A]:
Neutrinos