user: Question: What is the lowest round of the position de player with an overall less than 84?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 28.0, 28.0, 'Darrell Green', 'CB', 'Texas A&I']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Position" = 'de' AND "Overall" < 84.0;