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: Angiosperm sporophyte is dominant. 
Sentence2: Flowers form on angiosperms.
[A]: Angiosperm


[Q]: Sentence1: a flashlight converts chemical energy into light energy. 
Sentence2: PALight Flashlights are the ultimate personal LED flashlights.
[A]: flashlight


[Q]: Sentence1: Species are the different kinds of organisms. 
Sentence2: Macroevolution is evolution over geologic time above the level of the kind of organism.
[A]:
organisms