user: Question: How many times a year is the Brighton Marathon held?
Columns: ['Road race', 'Distance', 'Location', 'Country', 'Month held']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Maraton de Santiago', 'Marathon', 'Santiago', 'Chile', 'April']
SQL:

assistant: SELECT COUNT("Month held") FROM "Table" WHERE "Distance" = 'Marathon' AND "Location" = 'Brighton';