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: Angiosperm sporophyte is dominant. 
Sentence2: Flowers form on angiosperms.
[EX A]: Angiosperm

[EX Q]: Sentence1: creating wood-free paper does not require cutting down trees. 
Sentence2: creating printed media requires cutting down trees.
[EX A]: creating

[EX Q]: Sentence1: the uterus is used in reproduction. 
Sentence2: Through reproduction, the parents transmit genes to the offspring.
[EX A]:
reproduction