user: Question: what is the period if the player is Hashan Tillakaratne?
Columns: ['Rank', 'Dismissals', 'Catches', 'Stumps', 'Player', 'Period']
Types: ['real', 'real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 309.0, 244.0, 65.0, 'Kumar Sangakkara', '2000-Pre.']
SQL:

assistant: SELECT "Period" FROM "Table" WHERE "Player" = 'Hashan Tillakaratne';