Question: The publication date is 1980-05-17 for Star Wars Episode V: The Empire Strikes Back (the one that has Mark Hamill as a cast member), where is it published?
Choices: Tribeca Film Festival
Central Park
London
Montreal World Film Festival
2004 Cannes Film Festival
Greek Theatre, Los Angeles
European Union
Davao City
2008 Toronto International Film Festival
Washington, D.C.
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Star Wars Episode V: The Empire Strikes Back" . ?e <cast_member> ?e_1 . ?e_1 <pred:name> "Mark Hamill" .  ?e <publication_date> ?pv . ?pv <pred:date> "1980-05-17"^^xsd:date . [ <pred:fact_h> ?e ; <pred:fact_r> <publication_date> ; <pred:fact_t> ?pv ] <place_of_publication> ?qpv .  }
Program:
function: Find
inputs: Mark Hamill
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Star Wars Episode V: The Empire Strikes Back
function: And
dependencies: 1
2
function: QueryAttrQualifier
dependencies: 3
inputs: publication date
1980-05-17
place of publication
Answer: Washington, D.C.