user: Question: what is the highest pick for the position Tight end?
Columns: ['Pick', 'Team', 'Player', 'Position', 'College']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [137.0, 'Boston Patriots', 'David Lee Category:Articles with hCards', 'End', 'Louisiana Tech']
SQL:

assistant: SELECT MAX("Pick") FROM "Table" WHERE "Position" = 'Tight end';