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.

Input: Consider Input: Sentence1: Most people know that the Venus Flytrap is a carnivorous plant.
Sentence2: The Venus Flytrap has specialized reproductive organs.

Output: Flytrap

Input: Consider Input: Sentence1: Finally, the fluid in the nephron reaches a collecting duct .
Sentence2: fluid in the kidneys collect into ducts.

Output: fluid

Input: Consider Input: Sentence1: Coral reefs provide food and shelter to many ocean organisms.
Sentence2: clownfish seek shelter in coral.
Output: Coral