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: Warm temperatures have helped plant growth and sizing. 
Sentence2: a greenhouse helps  plant growth.

SOLUTION: growth

PROBLEM: Sentence1: Mollusks are invertebrates such as the common snail. 
Sentence2: Another common snail is the decollate snail.

SOLUTION: snail

PROBLEM: Sentence1: Balance is the ability to sense and maintain body position. 
Sentence2: the ability to maintain equilibrium is the ability to sense and maintain body position.

SOLUTION:
ability