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: Most water comes from precipitation. 
Sentence2: aquatic animals require precipitation to survive.

Answer: precipitation


Question: Sentence1: a switch is used to start the flow of current in an electrical circuit. 
Sentence2: lights are on when there is flow of current in an electrical circuit.

Answer: circuit


Question: Sentence1: if heat is conducted to an object then that object will become hot. 
Sentence2: if heat is conducted to an object that object will emit more energy.

Answer:
conducted