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: disease-causing microbes have a negative impact on the body. 
Sentence2: pathogens have a negative impact on the body.

SOLUTION: body

PROBLEM: Sentence1: Combustion generates toxic fumes. 
Sentence2: High temperatures can cause toxic fumes.

SOLUTION: fumes

PROBLEM: Sentence1: a flashlight converts chemical energy into light energy. 
Sentence2: Light energy can become heat energy and heat energy can become light energy.

SOLUTION:
energy