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.

Sentence1: Every photograph is produced by a camera. 
Sentence2: Photographers record images.
photograph

Sentence1: Earthquakes are natural disasters. 
Sentence2: earthquakes can cause animals to leave an environment.
Earthquakes

Sentence1: microorganisms cause food to spoil. 
Sentence2: Food poisoning occurs when spoiled food is eaten.

spoil