CREATE TABLE table_51961 ("Train No." TEXT, "Train Name" TEXT, "Origin" TEXT, "Destination" TEXT, "Frequency" TEXT)

From where did Train No. 15929/30 originate?
SELECT "Origin" FROM table_51961 WHERE "Train No." = '15929/30'
SELECT "Origin" FROM "table_51961" WHERE "Train No." = '15929/30'