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: Infection is what ultimately leads to death. 
Sentence2: scraping oneself on a contaminated object may cause death.

Answer: death


Question: Sentence1: After a seed is planted it is watered. 
Sentence2: seeds need water.

Answer: seed


Question: Sentence1: recycling has a positive impact on the environment. 
Sentence2: Plastic bags are recyclable and they are reusable.

Answer:
recycling