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: Dormancy is an adaptation that improves the chances of surviving until warm temperatures return. 
Sentence2: Animals use dormancy to improve the chances of surviving.

improves