Question: Which version B-58 aircraft model originated in the United States has 2 in service?
SQL: SELECT "Aircraft" FROM "2-1015521-1" WHERE "In service" = '2' AND "Origin" = 'United States' AND "Versions" = 'B-58';

Question: What aircraft type is the CASA C-212 Aviocar?
SQL: SELECT "Type" FROM "2-1015521-1" WHERE "Aircraft" = 'CASA C-212 Aviocar';

Question: How many T-260 EU aircrafts are currently in service?
SQL: SELECT "In service" FROM "2-1015521-1" WHERE "Versions" = 'T-260 EU';

Question: How many C-95 aircrafts originating in Brazil are currently in service?
SQL: SELECT "In service" FROM "2-1015521-1" WHERE "Origin" = 'Brazil' AND "Versions" = 'C-95';