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: the ovaries are used in reproduction. 
Sentence2: Egg released by the ovary.

Answer: ovaries


Question: Sentence1: Plants use unsaturated fatty acids to store energy. 
Sentence2: Plants and fish contain fatty acids.

Answer: Plants


Question: Sentence1: Growth is faster during infancy than it is during puberty. 
Sentence2: Growth is faster during the neonatal period than it is during puberty.

Answer:
Growth