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: Limestone caves displaying stalactites. 
Sentence2: Limestone caves are formed by depositions.

A: Limestone
****
Q: Sentence1: soil is formed by weathering. 
Sentence2: Something described as loamy is formed by weathering.

A: formed
****
Q: Sentence1: crumple means change shape from smooth into compacted by physical force. 
Sentence2: Paper is then crumpled into the general shape and tied.

A:
crumple
****