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: Most sands are weathered fragments of quartz. 
Sentence2: Rocks interacting with wind over long periods of time results in sand.

sands