instruction:
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.
question:
Sentence1: Some birds are pollinators that co-evolved with plants. 
Sentence2: insects pollinate plants.
answer:
plants


question:
Sentence1: Skin color is another polygenic trait. 
Sentence2: Skin color is influenced by multiple genes.
answer:
Skin


question:
Sentence1: nuclear reactions in stars causes stars to produce light. 
Sentence2: Neutrinos are produced in some nuclear reactions in stars.
answer:

nuclear