Table schema:
CREATE TABLE table_name_33 (road_numbers VARCHAR, build_year VARCHAR, railroad__quantity_ VARCHAR)

Question: what is the road numbers when the build year is 1943, the railroad (quantity) is clinchfield railroad (12 new, 6 secondhand)?
SQL: SELECT road_numbers FROM table_name_33 WHERE build_year = "1943" AND railroad__quantity_ = "clinchfield railroad (12 new, 6 secondhand)"