SELECT count(*) FROM flight WHERE velocity  >  200
How many flights have a velocity larger than 200?
[Schema (values) (types)]: | flight_company |  airport : id (text) , city (number) , country (text) , iata (text) , icao (text) , name (text) | operate_company : id (text) , name (number) , type (text) , principal_activities (text) , incorporated_in (text) , group_equity_shareholding (text) | flight : id (text) , vehicle_flight_number (number) , date (text) , pilot (text) , velocity (text) , altitude (text) , airport_id (text) , company_id (number);