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: Nonmetal elements are far fewer in number. 
Sentence2: There are 17 nonmetals on the periodic table.
[EX A]: Nonmetal

[EX Q]: Sentence1: Ribosomes are structures in the cytoplasm where proteins are made. 
Sentence2: prokaryotes can make proteins.
[EX A]: made

[EX Q]: Sentence1: ice wedging is when ice causes rocks to crack by expanding in openings. 
Sentence2: when ice causes rocks to crack by expanding in openings is the most important form of mechanical weathering.
[EX A]:
causes