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.

[EX Q]: Sentence1: Specialization decreases mortality 12,13 and increases survival. 
Sentence2: evolving different adaptations increases survival.
[EX A]: increases

[EX Q]: Sentence1: Autumn brings the changing of the seasons. 
Sentence2: Earth 's tilt on its rotating axis causes autumn.
[EX A]: Autumn

[EX Q]: Sentence1: When seawater freezes, salt is expelled from the solid in a concentrated salt solution called brine. 
Sentence2: Salt is expelled from seawater as it freezes at the freezing point.
[EX A]:
expelled