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: Endospores are commonly found in soil and water. 
Sentence2: Some bacteria form resistant cells called endospores.

SOLUTION: Endospores

PROBLEM: Sentence1: Evaporation of sweat uses energy, and the energy comes from body heat. 
Sentence2: Evaporation of sweat uses energy, and the energy comes from exercise.

SOLUTION: Evaporation

PROBLEM: Sentence1: Algae Algae Green algae are the simplest of green plants. 
Sentence2: the simplest of green plants have varied life cycles.

SOLUTION:
green