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: drought is when amount of precipitation decreases. 
Sentence2: Drought decreases the availability and abundance of the natural food supply.
[A]: drought


[Q]: Sentence1: Plants live just about everywhere on Earth. 
Sentence2: epiphytes live everywhere on earth.
[A]: everywhere


[Q]: Sentence1: Slate is a metamorphic rock. 
Sentence2: slate is formed with extreme heat and pressure.
[A]:
Slate