user: Question: Which team has a League from of Ontario Hockey League, and a Player of Tony DeHart?
Columns: ['Pick #', 'Player', 'Nationality', 'Position', 'NHL team', 'Team from', 'League from']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [121.0, 'Tyler Bunz', 'Canada', 'G', 'Edmonton Oilers', 'Medicine Hat Tigers', 'Western Hockey League']
SQL:

assistant: SELECT "NHL team" FROM "Table" WHERE "League from" = 'Ontario Hockey League' AND "Player" = 'Tony DeHart';