user: Question: What is Tie No, when Date is 18 February 1956, and when Home Team is Charlton Athletic?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'West Bromwich Albion', '0–1', 'Birmingham City', '18 February 1956']
SQL:

assistant: SELECT "Tie no" FROM "Table" WHERE "Date" = '18 February 1956' AND "Home team" = 'Charlton Athletic';