user: Question: What is the average drop zoNe time iN the N drop zoNe for the 1st Pathfinder Prov.?
Columns: ['Serial', 'Airborne Unit', 'Troop carrier Group', '# of C-47s', 'UK Base', 'Drop Zone', 'Drop Zone Time']
Types: ['real', 'text', 'text', 'real', 'text', 'text', 'real']
Sample row: [4.0, 'Pathfinders', '1st Pathfinder Prov.', 3.0, 'RAF North Witham', 'O', 121.0]
SQL:

assistant: SELECT AVG("Drop Zone Time") FROM "Table" WHERE "Drop Zone" = 'N' AND "Troop carrier Group" = '1st Pathfinder Prov.';