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: Sperm pass out of the body through the urethra. 
Sentence2: Sperm travel from the testicles through the vas deferens to the seminal vesicles and the prostate.

A: Sperm
****
Q: Sentence1: Interstellar space contains a plasma. 
Sentence2: interstellar space contains electrons, atoms, and stars.

A: Interstellar
****
Q: Sentence1: Genes that are located on the same chromosome are called linked genes. 
Sentence2: For example, epilepsy and splay leg tend to link with the vienna white gene.

A:
genes
****