Question: Where was released the film that was executive produced by Leonard Nimoy and released in 1991-12-06?
Choices: South Africa
North America
Venezuela
Turkey
Vietnam
1949 Cannes Film Festival
United States of America
BFI London Film Festival
United Arab Emirates
Bahrain
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <executive_producer> ?e_1 . ?e_1 <pred:name> "Leonard Nimoy" .  ?e <publication_date> ?pv . ?pv <pred:date> "1991-12-06"^^xsd:date . [ <pred:fact_h> ?e ; <pred:fact_r> <publication_date> ; <pred:fact_t> ?pv ] <place_of_publication> ?qpv .  }
Program:
function: Find
inputs: Leonard Nimoy
function: Relate
dependencies: 0
inputs: executive producer
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: QueryAttrQualifier
dependencies: 2
inputs: publication date
1991-12-06
place of publication
Answer: United States of America