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: Electrical currents cause magnetic fields. 
Sentence2: Electrical currents can cause objects to repel each other.
[EX A]: Electrical

[EX Q]: Sentence1: Erosion of rock makes nutrients available. 
Sentence2: rain causes nutrients to be available.
[EX A]: nutrients

[EX Q]: Sentence1: Average vehicle speed rises by only 0.3 miles per hour. 
Sentence2: a speedometer measures miles per hour.
[EX A]:
hour