user: Question: What was the kickoff date for the round value of R4?
Columns: ['Round', 'Kick Off', 'Opponents', 'H / A', 'Result', 'Attendance', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['R3', '1990-01-06', 'Swansea City', 'A', '0–0', 16098.0, 'MR']
SQL:

assistant: SELECT "Kick Off" FROM "Table" WHERE "Round" = 'R4';