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: when electricity flows to a light bulb , the light bulb will turn on. 
Sentence2: water pumps can turn on light bulbs.

Answer: bulb


Question: Sentence1: Ribosomes are structures in the cytoplasm where proteins are made. 
Sentence2: prokaryotes can make proteins.

Answer: made


Question: Sentence1: Locusts are amongst the most dramatic and devastating of the insect pests. 
Sentence2: Locusts are amongst the most dramatic and devastating pest, they spread disease and destroy crops.

Answer:
Locusts