user: Question: What is the highest round that has an overall of 143 and a pick greater than 6?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 6.0, 6.0, 'LaRon Landry', 'S', 'Louisiana State']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Overall" = 143.0 AND "Pick" > 6.0;