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: Most bryophytes are small. 
Sentence2: Most in the same group as mosses are small.
[A]: small


[Q]: Sentence1: Finally, the fluid in the nephron reaches a collecting duct . 
Sentence2: fluid in the kidneys collect into ducts.
[A]: fluid


[Q]: Sentence1: Oncogenes promote the division of cells with damaged DNA. 
Sentence2: Quaternary messengers promote the division of cells with damaged DNA.
[A]:
DNA