QUESTION: answer this: the main difference between isotopes of the same element??

ANS: its number of neutrons
input: What is the answer to this question? how many keys on a concert grand piano?

output: 88
In: who won the women's final at wimbledon this year??

Out: Angelique Kerber
Please answer this: who sings born to hand jive from grease?

Sha-Na-Na
Q: Answer this question:

where does do start in the key of c??

A: C
QUESTION: answer this: who played otis williams in the movie the temptations??

ANS:
Charles Malik Whitfield