user: Question: Who has the highest assists on April 28?
Columns: ['Game', 'Date', 'Team', 'Score', 'High points', 'High rebounds', 'High assists', 'Location Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'April 18', 'Chicago', 'L 103–105 (OT)', 'Rajon Rondo (29)', 'Rajon Rondo (9)', 'Rajon Rondo (7)', 'TD Banknorth Garden 18,624', '0–1']
SQL:

assistant: SELECT "High assists" FROM "Table" WHERE "Date" = 'April 28';