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: Ribosomes are small organelles where proteins are made. 
Sentence2: Ribosomes are assembled inside the nucleus.

SOLUTION: Ribosomes

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

SOLUTION: energy

PROBLEM: Sentence1: Penguins are a type of birds. 
Sentence2: penguins are endothermic tetrapod vertebrates.

SOLUTION:
Penguins