Question: Which visual artwork has auto racing as its primary subject?
Choices: Rebecca
Pleasantville
Nine
Miracle at St. Anna
A Prairie Home Companion
Bicentennial Man
Senna
The Wicker Man
Oliver Twist
Speed Racer
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <main_subject> ?e_1 . ?e_1 <pred:name> "auto racing" .   }
Program:
function: Find
inputs: auto racing
function: Relate
dependencies: 0
inputs: main subject
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: What
dependencies: 2
Answer: Senna