Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:

Convert text to sql: Find the number of routes from the United States to Canada. | routes : rid , dst_apid , dst_ap , src_apid , src_ap , alid , airline , codeshare | airports : apid , name , city , country , x , y , elevation , iata , icao | airlines : alid , name , iata , icao , callsign , country , active | routes.alid = airlines.alid | routes.src_apid = airports.apid | routes.dst_apid = airports.apid | 

### Response:

select count ( _ ) from _ where _ in ( select _ from _ where _ ) and _ in ( select _ from _ where _ ) | select count ( * ) from routes where dst_apid in ( select apid from airports where country = 'Canada' ) and src_apid in ( select apid from airports where country = 'United States' )