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.

[EX Q]: Sentence1: a circle graph can be used to display percents. 
Sentence2: pie charts are circle graphs.
[EX A]: circle

[EX Q]: Sentence1: Viruses contain DNA but not much else. 
Sentence2: viruses contain encoded information but not much else.
[EX A]: Viruses

[EX Q]: Sentence1: a pan is used for cooking food by heating food in it on a stove. 
Sentence2: a pan is used for cooking meals by heating them on the stove.
[EX A]:
cooking