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: For example, hearing waves are transmitted by fluid in the inner ear. 
Sentence2: fluid in the inner ear is used for sensing sound by animals.

inner