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.

[EX Q]: Sentence1: the digestive system breaks food into nutrients for the body. 
Sentence2: Meat is a nutrient-dense food.
[EX A]: food

[EX Q]: Sentence1: friction is used for stopping a vehicle by brakes. 
Sentence2: friction is used for stopping a car by brakes.
[EX A]: brakes

[EX Q]: Sentence1: Electrical particles in materials vibrate and accelerate. 
Sentence2: hitting an object moves electric particles.
[EX A]:
Electrical