CREATE TABLE table_4243 ("Train number" FLOAT, "Train name" CLOB, "Origin" CLOB, "Destination" CLOB, "Service" CLOB, "Route/Via." CLOB)

What is the train number for the train name island express with a destination of kanniyakumari?
SELECT "Train number" FROM table_4243 WHERE "Train name" = 'Island Express' AND "Destination" = 'Kanniyakumari'
SELECT "Train number" FROM "table_4243" WHERE "Destination" = 'Kanniyakumari' AND "Train name" = 'Island Express'