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: decomposition increases the amount of nutrients in the soil. 
Sentence2: decomposition increases the amount of cations.

SOLUTION: amount

PROBLEM: Sentence1: First, the bottle is calibrated with a graduated cylinder. 
Sentence2: calibration is performed with a cylinder.

SOLUTION: calibrated

PROBLEM: Sentence1: Sporangia produce spores that develop into tiny, heart-shaped gametophytes. 
Sentence2: During asexual reproduction the spore enclosures produce heart-shaped gametophytes.

SOLUTION:
gametophytes