CREATE TABLE table_71140 ("Year" FLOAT, "Tournament" CLOB, "Venue" CLOB, "Result" CLOB, "Event" CLOB)

What event was held in Chihuahua, Mexico?
SELECT "Event" FROM table_71140 WHERE "Venue" = 'chihuahua, mexico'
SELECT "Event" FROM "table_71140" WHERE "Venue" = 'chihuahua, mexico'