CREATE TABLE table_203_674 (id DECIMAL, "name" TEXT, "mark" TEXT, "system" TEXT, "from" DECIMAL, "to" DECIMAL, "successor" TEXT, "notes" TEXT)

what is the only now defunct railroad that existed for 156 years ?
SELECT "name" FROM table_203_674 WHERE "to" - "from" = 156
SELECT "name" FROM "table_203_674" WHERE "to" - "from" = 156