CREATE TABLE table_24571 ("Train No." CLOB, "Train Name" CLOB, "Destination" CLOB, "Category" CLOB, "Frequency" CLOB)

What is the category for trains numbered 16609/16610?
SELECT "Category" FROM table_24571 WHERE "Train No." = '16609/16610'
SELECT "Category" FROM "table_24571" WHERE "Train No." = '16609/16610'