TASK 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.
PROBLEM: Sentence1: Asbestos is a dangerous carcinogen. 
Sentence2: Asbestos causes cancer.

SOLUTION: Asbestos

PROBLEM: Sentence1: Fertilization occurs naturally in the fallopian tubes. 
Sentence2: fertilization is used for reproduction.

SOLUTION: Fertilization

PROBLEM: Sentence1: changes in the pH of soil can cause plants to die. 
Sentence2: Adding sulfer to soil can cause plants to die.

SOLUTION:
die