user: Question: Tell me the year for Defensive tackle and college of LSU
Columns: ['Year', 'Pick', 'Player name', 'Position', 'College']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1976.0, '1', 'Lee Roy Selmon *†', 'Defensive end', 'Oklahoma']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Position" = 'Defensive tackle' AND "College" = 'LSU';