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: healing requires rest. 
Sentence2: healing requires time.
[EX A]: healing

[EX Q]: Sentence1: Interstellar space contains a plasma. 
Sentence2: interstellar space contains electrons, atoms, and stars.
[EX A]: Interstellar

[EX Q]: Sentence1: Animals are a kingdom of multicellular eukaryotes. 
Sentence2: Most eukaryotes reproduce sexually.
[EX A]:
eukaryotes