Database: flight_4
Question: Return the number of routes with destination airport in Italy operated by the airline with name 'American Airlines'.
SQL: select count(*) from routes as t1 join airports as t2 on t1.dst_apid  =  t2.apid join airlines as t3 on t1.alid  =  t3.alid where t2.country  =  'italy' and t3.name  =  'american airlines'