user: Question: When was the away team Geelong?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Richmond', '14.13 (97)', 'Carlton', '10.11 (71)', 'Colonial Stadium', 16375.0, 'Friday, 1 March']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team" = 'Geelong';