user: ### NOW ANSWER:
Question: Who placed highest with a time of 1:47.70?
Columns: ['Rank', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 4.0, 'Jean Basson', 'South Africa', '1:46.13']
SQL:

assistant: SELECT MIN("Rank") FROM "Table" WHERE "Time" = '1:47.70';