CREATE TABLE table_name_41 (event VARCHAR2, meet VARCHAR2, time VARCHAR2)

What is Event, when Meet is 'World Championships', and when Time is '20.51'?
SELECT event FROM table_name_41 WHERE meet = "world championships" AND time = "20.51"
SELECT "event" FROM "table_name_41" WHERE "20.51" = "time" AND "meet" = "world championships"