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: Balance is the ability to sense and maintain body position. 
Sentence2: Another part of the inner ear is used for balance.

SOLUTION: Balance

PROBLEM: Sentence1: Secondary accidents are a major problem under driving conditions of reduced visibility. 
Sentence2: Bad weather increases the risk of car accidents.

SOLUTION: Secondary

PROBLEM: Sentence1: Insects can spread disease and destroy crops. 
Sentence2: insects can destroy a farmer's stock in trade.

SOLUTION:
Insects