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: evaporation can be used for separating a solute from a solvent in a solution. 
Sentence2: Evaporation can be used for segregation a solute from a solvent in a solution.
[A]: a


[Q]: Sentence1: Bivalves feed on plankton and nonliving organic matter. 
Sentence2: Clams feed on plankton and nonliving organic matter.
[A]: feed


[Q]: Sentence1: Some herbivores have more than one stomach. 
Sentence2: Horses are non-ruminant herbivores, which means that unlike cows, they have only a single stomach.
[A]:
herbivores