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: Information on DNA is organized into genes. 
Sentence2: DNA codes for proteins.
[EX A]: DNA

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

[EX Q]: Sentence1: Aging occurs as cells lose their ability to divide. 
Sentence2: aging occurs because of a loss of mitosis.
[EX A]:
Aging