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 Input:
Sentence1: Annelids have the amazing capacity to regrow segments that break off. 
Sentence2: Earthworms can regrow segments that break off.

Ex Output:
break


Ex Input:
Sentence1: Ovulation is the release of an egg from an ovary. 
Sentence2: The release of an egg during ovulation is used in reproduction.

Ex Output:
Ovulation


Ex Input:
Sentence1: Different foods contain different nutrients. 
Sentence2: having nutrients has a positive impact on an organism 's health.

Ex Output:

nutrients