Schema: CREATE TABLE table_name_46 (date__from_ VARCHAR, name_of_system VARCHAR, traction_type VARCHAR)
Question: On what date did the event begin that had a steam traction type and used the system named HSM (1883–1910) GT (1915–1922)?
SQL: SELECT date__from_ FROM table_name_46 WHERE name_of_system = "hsm (1883–1910) gt (1915–1922)" AND traction_type = "steam"