CREATE TABLE railway (Builder VARCHAR, Railway_ID VARCHAR)
CREATE TABLE train (Railway_ID VARCHAR, Name VARCHAR)

Show the builder of railways associated with the trains named 'Andaman Exp'.
SELECT T1.Builder FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID WHERE T2.Name = "Andaman Exp"
SELECT "T1"."Builder" FROM "railway" AS "T1" JOIN "train" AS "T2" ON "Andaman Exp" = "T2"."Name" AND "T1"."Railway_ID" = "T2"."Railway_ID"