Table: southern_locomotives_4
Columns: class
wheels
date
no_built
loco_nos

Question: On what date were 5 built with 4-4-2t wheels?
SQL: SELECT "date" FROM southern_locomotives_4 WHERE "no_built" = 5 AND "wheels" = '4-4-2t'

Question: On what date was the number of locomotives 421-6?
SQL: SELECT "date" FROM southern_locomotives_4 WHERE "loco_nos" = '421-6'

Question: How many were built with a locomotive number of 11-20?
SQL: SELECT "no_built" FROM southern_locomotives_4 WHERE "loco_nos" = '11-20'

Question: On what date were more than 5 built with 4-4-2 wheels?
SQL: SELECT "date" FROM southern_locomotives_4 WHERE "wheels" = '4-4-2' AND "no_built" > 5

Question: On what date were less than 10 built with a locomotive number of 31-35?
SQL: SELECT "date" FROM southern_locomotives_4 WHERE "no_built" < 10 AND "loco_nos" = '31-35'