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: cold fronts cause thunderstorms as they pass by. 
Sentence2: Thunderstorms create havoc.
[A]: thunderstorms


[Q]: Sentence1: Thrinaxodon, a small Lystrosaurus Zone cynodont, shows many of the characters of the group. 
Sentence2: Thrinaxodon is from the animal family that eventually evolved into mammals.
[A]: Thrinaxodon


[Q]: Sentence1: Chlorine bleach is ideal for treating water. 
Sentence2: Chlorine bleach removes harmful substances from water before drinking.
[A]:
Chlorine