Question: Which Opened has a System of c-train, and a Daily ridership smaller than 269600?
SQL: SELECT MAX("Opened") FROM "2-18567686-1" WHERE "System" = 'c-train' AND "Daily ridership" < 269600.0;

Question: Which Stations are in Vancouver, BC?
SQL: SELECT "Stations" FROM "2-18567686-1" WHERE "City" = 'Vancouver, BC';

Question: Which category has 5 stations?
SQL: SELECT "Category" FROM "2-18567686-1" WHERE "Stations" = '5';

Question: Which Opened has a Category of Diesel light rail?
SQL: SELECT MAX("Opened") FROM "2-18567686-1" WHERE "Category" = 'Diesel light rail';