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: First, the bottle is calibrated with a graduated cylinder. 
Sentence2: calibration is performed with a cylinder.

SOLUTION: calibrated

PROBLEM: Sentence1: a switch is used to start the flow of current in an electrical circuit. 
Sentence2: The flow of electrical current powers a light bulb.

SOLUTION: current

PROBLEM: Sentence1: if a plant requires less water then that plant will survive in a drought. 
Sentence2: if a plant requires less water then the plant will survive and is heat tolerent.

SOLUTION:
less