user: Question: What date was the visiting team of Los Angeles Rams, earlier than 1958?
Columns: ['Year', 'Date', 'Home Team', 'Result', 'Visiting Team', 'Venue', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1950.0, 'October 1', 'San Francisco 49ers', '14-35', 'Los Angeles Rams', 'Kezar Stadium', 27262.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Visiting Team" = 'Los Angeles Rams' AND "Year" < 1958.0;