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

Answer: Many


Question: Sentence1: plant reproduction requires pollination. 
Sentence2: Plant reproduction requires insects and hummingbirds.

Answer: plant


Question: Sentence1: Balanced eating is a way of eating that promotes good health. 
Sentence2: Food labels a 'tremendous tool' for achieving balance and variety in eating style NWSB225.

Answer:
Balanced