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.

Q: Sentence1: smell is used for finding food by some animals. 
Sentence2: Food includes small rodents and birds.

A: food
****
Q: Sentence1: Asbestos is a dangerous carcinogen. 
Sentence2: Asbestos causes cancer.

A: Asbestos
****
Q: Sentence1: An electric sharpener removes too much metal and often causes waves. 
Sentence2: An object's shape can be changed by removing material.

A:
removes
****