You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: ARE YOU A BETTING MAN? 
Clue: C'mon, one more cherry!  Bally's Las Vegas became the first hotel with a $1,000 one of these
a slot machine

Category: JOHN/PAUL 
Clue: Paul wrote this paean to Soviet women while in India with the Maharishi Mahesh Yogi
"back in the u.s.s.r."

Category: LYRICS 
Clue: "He rocks in the tree-top all day long"

"rockin\' robin"