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: Scyphozoans are the next group of Cnidarians, and they are the familiar jellyfish. 
Sentence2: Scyphozoans are aquatic organisms.
[A]: Scyphozoans


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


[Q]: Sentence1: By definition, menopause occurs when menstruation stops permanently. 
Sentence2: Usually in middle adulthood menopause happens when menstruation stops permanently.
[A]:
menopause