user: ### NOW ANSWER:
Question: Which round was the defensive tackle picked after 187?
Columns: ['Round', 'Pick #', 'Player', 'Position', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 23.0, 'Willis McGahee', 'Running Back', 'Miami (Fl.)']
SQL:

assistant: SELECT AVG("Round") FROM "Table" WHERE "Position" = 'defensive tackle' AND "Pick #" > 187.0;