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


question:
Sentence1: ultraviolet light causes sunburn. 
Sentence2: Sunburn risk is higher at elevation.
answer:
sunburn


question:
Sentence1: damming a river can cause a lake to form. 
Sentence2: Beavers build dams.
answer:

damming