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: Weather Clear weather usually means good visibility. 
Sentence2: High pressure systems can cause good visibility.
[EX A]: good

[EX Q]: Sentence1: infection can cause bodily tissues to swell. 
Sentence2: Bacteria can cause bodily tissues to swell.
[EX A]: bodily

[EX Q]: Sentence1: Macroevolution occurs over geologic time above the level of the species. 
Sentence2: Geologic time lines are expressed in geologic eras and periods.
[EX A]:
geologic