Question: What is the Channel 4's headquarter street address in  London (the one whose ISO 3166-2 code is GB-LND)?
Choices: 110 Inner Campus Drive, Austin, TX, 78712
1600 Holloway Ave, San Francisco, CA, 94132
124 Horseferry Road
2900 Bedford Ave, Brooklyn, NY, 11210
1 E Jackson Blvd, Chicago, IL, 60604
893 West St, Amherst, MA, 01002-5001
501 East High St, Oxford, OH, 45056
4000 Mayflower Hill Drive, Waterville, ME, 04901-8840
222 S. Copeland Street, Tallahassee, FL, 32306-1037
300 Day Hall, Ithaca, NY, 14853
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Channel 4" . ?e_2 <pred:name> "London" . ?e_2 <ISO_3166-2_code> ?pv . ?pv <pred:value> "GB-LND" . ?e_1 <headquarters_location> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <headquarters_location> ; <pred:fact_t> ?e_2 ] <located_at_street_address> ?qpv .  }
Program:
function: Find
inputs: Channel 4
function: Find
inputs: London
function: FilterStr
dependencies: 1
inputs: ISO 3166-2 code
GB-LND
function: QueryRelationQualifier
dependencies: 0
2
inputs: headquarters location
located at street address
Answer: 124 Horseferry Road