Question: What language is  http://stadt.koeln, the official website of a big city whose postal code is 51067, made in ?
Choices:
Croatian
Jèrriais
German
Old English
Northern Sotho
Lower Sorbian
Catalan
Atikamekw
Macedonian
Punjabi
Answer: German
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "big city" . ?e <postal_code> ?pv_1 . ?pv_1 <pred:value> "51067" . ?e <official_website> ?pv . ?pv <pred:value> "http://stadt.koeln" . [ <pred:fact_h> ?e ; <pred:fact_r> <official_website> ; <pred:fact_t> ?pv ] <language_of_work_or_name> ?qpv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: postal code
51067
function: FilterConcept
dependencies: 1
inputs: big city
function: QueryAttrQualifier
dependencies: 2
inputs: official website
http://stadt.koeln
language of work or name