If you know the Sinatra version, it wouldn't occur to you to ask which version they're referring to.
If you know the Sinatra version you might also know it was done by tons of other people, like Ella Fitzgerald, Tony Bennett, Mel Tormé, etc. Sinatra wasn't even the original.
People tweeting stuff. We allow tweets from anyone.
RULES:
If you know the Sinatra version, it wouldn't occur to you to ask which version they're referring to.
If you know the Sinatra version you might also know it was done by tons of other people, like Ella Fitzgerald, Tony Bennett, Mel Tormé, etc. Sinatra wasn't even the original.