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: a camera is used for recording images. 
Sentence2: a camera is used for recording binary.

A: camera
****
Q: Sentence1: infection can cause bodily tissues to swell. 
Sentence2: Bacteria can cause bodily tissues to swell.

A: bodily
****
Q: Sentence1: an earthquake causes the ground to shake. 
Sentence2: The ground shaking can cause destruction.

A:
ground
****