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: Results can be damaging or disastrous. 
Sentence2: Lack of immunization can be damaging or disastrous.
[EX A]: damaging

[EX Q]: Sentence1: moss causes chemical weathering. 
Sentence2: If the moss was completely dried then it is dead.
[EX A]: moss

[EX Q]: Sentence1: a light bulb is used for seeing in the dark. 
Sentence2: After stumbling around in the dark tunnels of the basement, Marco finds the control room.
[EX A]:
dark