Task: Paraphrasing
Input (English): Question: Newton’s second law of what is more than a definition; it is a relationship among acceleration, force, and mass? 
Answer: motion. 
Sentence: Newton’s second law of motion is more than a definition; it is a relationship among acceleration, force, and mass.
Output (English): When you look at Newton's second law of motion, you can clearly see it is a relationship of acceleration, force, and mass.