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: Many corals secrete an exoskeleton that builds up to become a coral reef. 
Sentence2: Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals.
answer:
coral


question:
Sentence1: Amphibians have sense organs to smell and taste chemicals. 
Sentence2: Amphibians have a chemical sensing system.
answer:

Amphibians