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: a circle graph can be used to display percents. 
Sentence2: pie charts are circle graphs.

Answer: circle


Question: Sentence1: Mangoes are propagated vegetatively and by seeds. 
Sentence2: animals propagate mangoes.

Answer: Mangoes


Question: Sentence1: Favorite food is steak. 
Sentence2: steak consists of organic molecules that stores energy in its chemical bonds.

Answer:
steak