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: a battery converts chemical energy into electrical energy. 
Sentence2: Battery electricity comes conversion.

SOLUTION: battery

PROBLEM: Sentence1: Specialization decreases mortality 12,13 and increases survival. 
Sentence2: evolving different adaptations increases survival.

SOLUTION: increases

PROBLEM: Sentence1: Pepper is a seed from a plant. 
Sentence2: pepper can wait to germinate until conditions are favorable for growth.

SOLUTION:
Pepper