user: Question: What was the ticket price at Red Rocks Amphitheatre?
Columns: ['Date(s)', 'Venue', 'City', 'Ticket price(s)', 'Ticket sold / available', 'Ticket grossing']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['July 26, 1986', 'Merriweather Post Pavilion', 'Columbia, Maryland', '$16.50 / $11.50', '13,000 / 13,000 (100%)', '$176,267']
SQL:

assistant: SELECT "Ticket price(s)" FROM "Table" WHERE "Venue" = 'Red Rocks Amphitheatre';