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: Very often their only metal object in the house is a cooking pot or a knife. 
Sentence2: sharpening a knife causes it to change shape.
[EX A]: knife

[EX Q]: Sentence1: transpiration is when water vapor moves from plants into the atmosphere. 
Sentence2: Transpiration is part of the photosynthesis process.
[EX A]:
transpiration