CREATE TABLE table_31637 ("Aircraft" CLOB, "Origin" CLOB, "Type" CLOB, "Versions" CLOB, "In service" CLOB)

What aircraft type is the Casa C-212 Aviocar?
SELECT "Type" FROM table_31637 WHERE "Aircraft" = 'casa c-212 aviocar'
SELECT "Type" FROM "table_31637" WHERE "Aircraft" = 'casa c-212 aviocar'