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: Plants that have adapted by altering their physical structure are called xerophytes . 
Sentence2: Xerophytes change their physical structure to adapt to dry environments.

structure