Question: what is 1958 when 1957 is 2 and 1956 is 3?
SQL: SELECT "1958" FROM "2-1871428-1" WHERE "1957" = '2' AND "1956" = '3';

Question: what is 1955 when 1961 is N/A?
SQL: SELECT "1955" FROM "2-1871428-1" WHERE "1961" = 'N/A';