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: being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time. 
Sentence2: Marble is used for sculptures, and coal is used for fuel and energy like light.

SOLUTION: coal

PROBLEM: Sentence1: if a planet becomes too hot then that planet cannot sustain life. 
Sentence2: If a planet becomes too hot, then it cannot maintain a balanced ecosystem.

SOLUTION:
becomes