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: Skids occur when the car's speed overcomes tire traction. 
Sentence2: Braking and the car's speed overcoming traction causes cars to slide.

traction