Question: show me the city with the local dialing code of 503.
Choices: Hillsboro
San Salvador
Inverness
New Westminster
Ulm
Cork
Portland
Suzhou
Kanpur
Kingston
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city" . ?e <local_dialing_code> ?pv . ?pv <pred:value> "503" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: local dialing code
503
function: FilterConcept
dependencies: 1
inputs: city
function: What
dependencies: 2
Answer: San Salvador