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: Ribosomes are small organelles where proteins are made. 
Sentence2: Ribosomes are assembled inside the nucleus.

A: Ribosomes
****
Q: Sentence1: All cells share some of the same structures and basic functions. 
Sentence2: Inside the cell is a structure called the nucleus.

A: cells
****
Q: Sentence1: Some parasites kill their host, but most do not. 
Sentence2: Nutrients of the host are most likely absorbed through the body surface of the parasite.

A:
host
****