user: Question: Which nationality has a time of 50.92?
Columns: ['Rank', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [1.0, 4.0, 'Milorad Čavić Category:Articles with hCards', 'Serbia', 50.92]
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Time" = 50.92;