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: wind is used for producing electricity. 
Sentence2: Wind is caused because of pressure differences in the atmosphere.
[EX A]: wind

[EX Q]: Sentence1: Specialization occurs when competing species evolve different adaptations. 
Sentence2: evolving different adaptations increases survival.
[EX A]: adaptations

[EX Q]: Sentence1: On bare, dry soil, wind erosion can remove significant quantities of topsoil. 
Sentence2: The effects of erosion are greater on dry soil.
[EX A]:
dry