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.

[Q]: Sentence1: healing requires rest. 
Sentence2: healing requires time.
[A]: healing


[Q]: Sentence1: Cells are the microscopic building blocks of organisms. 
Sentence2: proteins are the building blocks of organisms.
[A]: organisms


[Q]: Sentence1: When the wiring is finished, they test the circuits for proper connections. 
Sentence2: When the wiring is finished, electrical current runs through it.
[A]:
When