which city is John F Kennedy International Airport located in?
select city from airports where name = 'John f kennedy international Airport'
which routes list it as a destination airport?
select * from airports as t1 join routes as t2 on t1.apid = t2.dst_apid where t1.name = 'John f kennedy international Airport'
how many of those routes are there?
select count(*) from airports as t1 join routes as t2 on t1.apid = t2.dst_apid where t1.name = 'John f kennedy international Airport'