Table: high_jump_euro_1998
Columns: athlete
nationality
2_15
2_20
2_24
2_27
result

Question: Which Nationality has a 2.24 of xo, and a 2.20 of xo?
SQL: SELECT "nationality" FROM high_jump_euro_1998 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 high_jump_euro_1998 WHERE "2_24" = 'xo' AND "2_20" = 'o' AND "2_15" = 'o'