SELECT count(*) FROM technician
How many technicians are there?
[Schema (values) (types)]: | machine_repair |  repair : repair_id (text) , name (number) , launch_date (text) , notes (text) | machine : machine_id (text) , making_year (number) , class (text) , team (text) , machine_series (text) , value_points (number) , quality_rank (number) | technician : technician_id (text) , name (number) , team (text) , starting_year (text) , age (text) | repair_assignment : technician_id (text) , repair_id (number) , machine_id (text);