user: ### NOW ANSWER:
Question: What is the name of the shortstop when the Catcher was Johnny Roseboro, and a Third Baseman of Jim Lefebvre, and a Second Baseman of Nate Oliver?
Columns: ['Year', 'Catcher', 'First Baseman', 'Second Baseman', 'Shortstop', 'Third Baseman', 'Rightfielder', 'Centerfielder', 'Leftfielder', 'Starting Pitcher']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2013.0, 'A. J. Ellis', 'Adrian Gonzalez', 'Mark Ellis', 'Justin Sellers', 'Luis Cruz', 'Andre Ethier', 'Matt Kemp', 'Carl Crawford', 'Clayton Kershaw']
SQL:

assistant: SELECT "Shortstop" FROM "Table" WHERE "Catcher" = 'Johnny Roseboro' AND "Third Baseman" = 'Jim Lefebvre' AND "Second Baseman" = 'Nate Oliver';