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: creating paper requires cutting down trees. 
Sentence2: Rainforests are destroyed by logging and all of the trees are cut down.
[EX A]: cutting

[EX Q]: Sentence1: Some herbivores have more than one stomach. 
Sentence2: Camels are an herbivore.
[EX A]: herbivores

[EX Q]: Sentence1: a camera is used for recording images. 
Sentence2: cameras use videotape for recording.
[EX A]:
camera