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.
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Question: Sentence1: Dinosaur bones, like many other artifacts, are fossilized. 
Sentence2: radioactive dating is used to determine the age of dinosaur bones.

Answer: Dinosaur


Question: Sentence1: drought is when amount of precipitation decreases. 
Sentence2: Drought decreases the availability and abundance of the natural food supply.

Answer: drought


Question: Sentence1: When an object moves or vibrates, the air molecules around the object also vibrate. 
Sentence2: Blowing air into a whistle causes air to move inside the whistle.

Answer:
moves