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: Basically the process is pretty simple. 
Sentence2: All cells share some of the same structures and simple processes.

A: process
****
Q: Sentence1: Any antigen that causes an allergy is called an allergen. 
Sentence2: molds are antigens.

A: antigen
****
Q: Sentence1: nerves can be used to feel heat and pressure on the skin. 
Sentence2: Nerve endings in the skin allow us to feel pain, pressure, heat, and cold.

A:
feel
****