Question: Which Nationality has a 2.24 of xo, and a 2.20 of xo?
SQL: SELECT "Nationality" FROM "2-14738028-4" WHERE "2.24" = 'xo' AND "2.20" = 'xo';

Question: Which Athlete has a 2.24 of xo, and a 2.20 of o, and a 2.15 of o?
SQL: SELECT "Athlete" FROM "2-14738028-4" WHERE "2.24" = 'xo' AND "2.20" = 'o' AND "2.15" = 'o';