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 "2-1867069-1" WHERE "Build year" = '1943' AND "Railroad (quantity)" = 'Clinchfield Railroad (12 new, 6 secondhand)';

Question: what is the road numbers when the builder is ALCO, the railroad (quantity) is Union Pacific Railroad (105) and the class is CSA-2?
SQL: SELECT "Road numbers" FROM "2-1867069-1" WHERE "Builder" = 'ALCO' AND "Railroad (quantity)" = 'Union Pacific Railroad (105)' AND "Class" = 'CSA-2';

Question: what is the road numbers when the class is Z-7?
SQL: SELECT "Road numbers" FROM "2-1867069-1" WHERE "Class" = 'Z-7';