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: When contracted the triceps femoris pulls the thigh forward and extends the shank. 
Sentence2: Muscles like the triceps femoris are used to move bones.

femoris