user: Question: Alana Boyd of group B with a 4.30 result has what nationality?
Columns: ['Group', 'Name', 'Nationality', '4.00', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['A', 'Yelena Isinbayeva', 'Russia', '–', '4.60']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Group" = 'B' AND "Result" = '4.30' AND "Name" = 'Alana Boyd';