user: Question: For the Light heavyweight –81 kg event that Did not advance to semifinal, who was the athlete?
Columns: ['Athlete', 'Event', 'Round of 32', 'Round of 16', 'Quarterfinal', 'Semifinal', 'Final']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Akbar Ahadi', 'Bantamweight –54 kg', 'Sheikhan W 15–6', 'Tulyakov L 4–12', 'Did not advance', 'Did not advance', 'Did not advance']
SQL:

assistant: SELECT "Athlete" FROM "Table" WHERE "Semifinal" = 'Did not advance' AND "Event" = 'Light heavyweight –81 kg';