user: Question: What is the lowest round for the player whose position is guard and had a pick number smaller than 144?
Columns: ['Round', 'Pick', 'Player', 'Position', 'School']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 6.0, 'James Lofton', 'Wide Receiver', 'Stanford']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Position" = 'guard' AND "Pick" < 144.0;