user: Question: What national has 4.45 for o and 4.55 for xo?
Columns: ['Name', 'Nationality', '4.30', '4.45', '4.55', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Yelena Isinbayeva', 'Russia', '–', '–', '–', 5.05]
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "4.45" = 'o' AND "4.55" = 'xo';