user: Question: What time did the game start on Saturday, April 20?
Columns: ['Week', 'Date', 'Kickoff', 'Opponent', 'Final score', 'Team record', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Saturday, March 23', '8:00 p.m.', 'London Monarchs', 'L 11–24', '0–1', 'Waldstadion', 23169.0]
SQL:

assistant: SELECT "Kickoff" FROM "Table" WHERE "Date" = 'Saturday, April 20';