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: Information on DNA is organized into genes. 
Sentence2: DNA codes for proteins.

Answer: DNA


Question: Sentence1: Many birds perform elaborate courtship dances. 
Sentence2: Many birds perform dances before they mate.

Answer: Many


Question: Sentence1: Plants help make oxygen for the air. 
Sentence2: An animal requires plants for survival.

Answer:
Plants