user: Question: what is the highest runners when the jockey is Frankie Dettori and the placing is higher than 1?
Columns: ['Race', 'Dist (f)', 'Course', 'Runners', 'Placing', 'Margin', 'Jockey', 'Trainer']
Types: ['text', 'real', 'text', 'real', 'real', 'real', 'text', 'text']
Sample row: ['South Norfolk Caterers Maiden Stakes', 8.0, 'Yarmouth', 18.0, 1.0, 5.0, 'Frankie Dettori', 'David Loder']
SQL:

assistant: SELECT MAX("Runners") FROM "Table" WHERE "Jockey" = 'Frankie Dettori' AND "Placing" > 1.0;