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: Water is essential for all life on Earth. 
Sentence2: H2O is needed for all life on Eartth.
[EX A]: Earth

[EX Q]: Sentence1: An electric current is a flow of electric charge. 
Sentence2: a magnet moving in a coil of copper wire can cause a flow of electric charge.
[EX A]: charge

[EX Q]: Sentence1: Manatees are a migrant species. 
Sentence2: manatees migrate long distances.
[EX A]:
Manatees