user: Question: how many times is the date (to) 1919?
Columns: ['Name of System', 'Location', 'Traction Type', 'Date (From)', 'Date (To)', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['ATM (1897–1917) GTA (1919–1922)', 'Apeldoorn', 'Horse', '12 August 1897', '11 November 1917', 'Apeldoornsche Tramweg-Maatschappij']
SQL:

assistant: SELECT COUNT("Notes") FROM "Table" WHERE "Date (To)" = '1919';