Question: Joss Whedon is the producer of what visual artwork?
Choices: A History of Violence
Legends of the Fall
Enid
A Prairie Home Companion
The Cabin in the Woods
Angel
Three Kings
Pleasantville
Bird
Rebecca
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <producer> ?e_1 . ?e_1 <pred:name> "Joss Whedon" .   }
Program:
function: Find
inputs: Joss Whedon
function: Relate
dependencies: 0
inputs: producer
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: What
dependencies: 2
Answer: The Cabin in the Woods