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: riding a bike does not cause pollution. 
Sentence2: riding a bike does not release particles.

Answer: bike


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: Pesticides for cranberries pollute the water. 
Sentence2: Pesticides for cranberries have a negative impact on the environment.

Answer:
Pesticides