Sherlock Holmes

On a snowy night Sherlock Holmes is sitting in his study reading a book when he hears a ruckus out front of his house and then a crash and a snowball breaks the window to his study. Sherlock Holmes jumps up and runs to the window and sees three brothers he recognizes from the neighborhood running away … John Travolta, Mark Travolta and Steven Travolta.

The very next morning, Sherlock Holmes hears a knock on his front door, he opens it but no one is there but whomever was there, left a note. The note read “? Travolta”.

Who should Sherlock Holmes question about the broken window?