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: Ground tissue makes up most of the interior of a plant. 
Sentence2: ground tissue makes up most of the interior of a dandelion.

SOLUTION: Ground

PROBLEM: Sentence1: Proper digestion is vital for nutrient absorption. 
Sentence2: Digestion is important for an animal's survival.

SOLUTION: digestion

PROBLEM: Sentence1: a thermometer is used to measure temperature. 
Sentence2: Temperature Temperature is an measurement of the amount of heat.

SOLUTION:
temperature