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: Fossilization is the process that turns a once living thing into a fossil. 
Sentence2: Scientists who study  the process that preserves a once living thing are called paleontologists.

living