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: Here, the lungs supply the blood with oxygen. 
Sentence2: Brain cells die quickly if their blood supply is cut off.
[EX A]: blood

[EX Q]: Sentence1: Scyphozoans are the next group of Cnidarians, and they are the familiar jellyfish. 
Sentence2: Scyphozoans are aquatic organisms.
[EX A]: Scyphozoans

[EX Q]: Sentence1: the gravitational pull of the Moon on Earth 's oceans causes the tides. 
Sentence2: erosion is caused by the ocean's tides resulting from gravitational pull.
[EX A]:
gravitational