CREATE TABLE "operating_system_support" (
  "windows" text,
  "mac_os_x" text,
  "linux" text,
  "other_unix" text,
  "amiga_os" text,
  "android" text,
  "windows_mobile" text
);

Question: Which Windows system has Windows Mobile of unknown, and a Mac OS X of yes, and another Unix of yes, and an AmigaOS of partial?
SQL: SELECT "windows" FROM "operating_system_support" WHERE "windows_mobile"='unknown' AND "mac_os_x"='yes' AND "other_unix"='yes' AND "amiga_os"='partial';

Question: Which Android has anOther Unix of unknown?
SQL: SELECT "android" FROM "operating_system_support" WHERE "other_unix"='unknown';

Question: Which Mac OS X has an AmigaOS of partial?
SQL: SELECT "mac_os_x" FROM "operating_system_support" WHERE "amiga_os"='partial';

Question: Which Mac OS X has a Linux of no, and an AmigaOS of no, and an Android of unknown?
SQL: SELECT "mac_os_x" FROM "operating_system_support" WHERE "linux"='no' AND "amiga_os"='no' AND "android"='unknown';

Question: Which AmigaOS has a Windows Mobile of no, and an Android of no?
SQL: SELECT "amiga_os" FROM "operating_system_support" WHERE "windows_mobile"='no' AND "android"='no';