CREATE TABLE train (train_id NUMBER, train_num CLOB, name CLOB, from CLOB, arrival CLOB, railway_id NUMBER)
CREATE TABLE manager (manager_id NUMBER, name CLOB, country CLOB, working_year_starts CLOB, age NUMBER, level NUMBER)
CREATE TABLE railway_manage (railway_id NUMBER, manager_id NUMBER, from_year CLOB)
CREATE TABLE railway (railway_id NUMBER, railway CLOB, builder CLOB, built CLOB, wheels CLOB, location CLOB, objectnumber CLOB)

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" "T1" JOIN "train" "T2" ON "Andaman Exp" = "T2"."name" AND "T1"."railway_id" = "T2"."railway_id"