Definition: 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.
Input: Sentence1: Acetate kinase is found in microbes of the bacteria and archaea domains. 
Sentence2: Acetate kinase is found in one of the domains that scientists still know relatively little about.

kinase