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: a battery converts chemical energy into electrical energy. 
Sentence2: Battery electricity comes conversion.
[EX A]: battery

[EX Q]: Sentence1: Cultivation is easier if soil is loose. 
Sentence2: soil with more oxygen is easier to cultivate.
[EX A]: Cultivation

[EX Q]: Sentence1: Dilation occurs when cell walls relax. 
Sentence2: Blood flow is improved by vitamin E and it causes blood vessels to dilate or expand.
[EX A]:
Dilation