Question: On what date did Hudswell Clarke build the locomotive with 0-6-0 ST wheel arrangements?
Schema: create table table_1157867_2 (date_built varchar, wheel_arrangement varchar, builder varchar, PRIMARY KEY (date_built))
SQL: select date_built from table_1157867_2 where wheel_arrangement = "0-6-0 st" and builder = "hudswell clarke"