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: Cnidarians have a hydrostatic skeleton. 
Sentence2: Jellyfish have a hydrostatic skeleton.

SOLUTION: hydrostatic

PROBLEM: Sentence1: Temperature Scales Temperature is the energy of vibration. 
Sentence2: a thermometer is used to measure energy of vibration.

SOLUTION: energy

PROBLEM: Sentence1: a flashlight requires a source of electricity to produce light. 
Sentence2: Emergency lighting source requires a source of electricity to produce light.

SOLUTION:
electricity