Question: What is the 1938 that has N/A for 1948?
SQL: SELECT "1938" FROM "2-1568261-1" WHERE "1948" = 'N/A';

Question: What 1953 has 2 for 1947, and DNE as 1938?
SQL: SELECT "1953" FROM "2-1568261-1" WHERE "1947" = '2' AND "1938" = 'DNE';

Question: What 1935 has 4 as a 1953?
SQL: SELECT "1935" FROM "2-1568261-1" WHERE "1953" = '4';

Question: What 1953 has 2 as a 1949, and 3 as 1952?
SQL: SELECT "1953" FROM "2-1568261-1" WHERE "1949" = '2' AND "1952" = '3';

Question: What 1941 has N/A as 1945, N/A for 1948, and 9 for 1953?
SQL: SELECT "1941" FROM "2-1568261-1" WHERE "1945" = 'N/A' AND "1948" = 'N/A' AND "1953" = '9';

Question: What 1951 has DNE for 1948?
SQL: SELECT "1951" FROM "2-1568261-1" WHERE "1948" = 'DNE';