Definition: 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.
Input: Sentence1: An increase in temperature is the result of the flow of heat into the system. 
Sentence2: increasing the temperature of salt water causes the water to evaporate while the salt remains.

increase