CREATE TABLE table_name_16 (distance VARCHAR2, event VARCHAR2, location VARCHAR2)

Which Distance has an Event of breaststroke, and a Location of beijing, chn?
SELECT distance FROM table_name_16 WHERE event = "breaststroke" AND location = "beijing, chn"
SELECT "distance" FROM "table_name_16" WHERE "beijing, chn" = "location" AND "breaststroke" = "event"