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: Macroevolution is more than repeated rounds of microevolution. 
Sentence2: evolution over geologic time above the level of the species is more than repeated rounds of microevolution.
[EX A]: microevolution

[EX Q]: Sentence1: Batteries are a better source of DC electricity. 
Sentence2: a flashlight requires batteries to produce light.
[EX A]: Batteries

[EX Q]: Sentence1: a ship is used for moving people across bodies of water. 
Sentence2: Currents flow across the large bodies of water from continent to continent.
[EX A]:
bodies