I want the number
select vehicle_flight_number from flight order by velocity limit 1
State the principal activities of Air Hong Kong?
select distinct principal_activities from operate_company where name = 'Air hong Kong'
What are the distinct types of the companies that have operated any flights with velocity less than 200?
select distinct t1.type from operate_company as t1 join flight as t2 on t1.id = t2.company_id where t2.velocity < 200
State the type of air china in the list?
select type from operate_company where name = 'Air China'