Question: Tell me the movie production company that is the production company of the visual artwork entitled Barcelona.
Choices: Castle Rock Entertainment
Gaumont Film Company
Hollywood Pictures
HBO Films
HBO
Spyglass Entertainment
Dimension Films
UTV Motion Pictures
Warner Bros.
Lucasfilm
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film production company" . ?e_1 <production_company> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "visual artwork" . ?e_1 <title> ?pv_1 . ?pv_1 <pred:value> "Barcelona" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: title
Barcelona
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: Relate
dependencies: 2
inputs: production company
forward
function: FilterConcept
dependencies: 3
inputs: film production company
function: What
dependencies: 4
Answer: Castle Rock Entertainment