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.

[Q]: Sentence1: Interest in fossils is worldwide. 
Sentence2: paleontologists study something with worldwide interest.
[A]: Interest


[Q]: Sentence1: Nitrogen is found in proteins, nucleic acids, and chlorophyll. 
Sentence2: Lawns eat nitrogen.
[A]: Nitrogen


[Q]: Sentence1: Ravens are big, black birds. 
Sentence2: Ravens absorb all visible light.
[A]:
Ravens