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: Most soil nutrients are cations. 
Sentence2: decomposition increases the amount of cations in the soil.
[EX A]: cations

[EX Q]: Sentence1: friction causes the temperature of an object to increase. 
Sentence2: Friction causes the temperature of a toy to increase.
[EX A]: causes

[EX Q]: Sentence1: Diet Filter feeders, they eat krill and plankton. 
Sentence2: Sponges eat krill and plankton.
[EX A]:
krill