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: Cells are the basic units of the structure and function of living things. 
Sentence2: Cells are the basic units of the structure and are biodegradable.

units