Question: Which film is based on the film that has Jack Warner (who founded Warner Bros.) as a cast member?
Choices: The Ladykillers
Bolero
Fame
The Insider
The Wicker Man
Rebecca
Pleasantville
Total Recall
A Prairie Home Companion
Greystoke: The Legend of Tarzan, Lord of the Apes
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film" . ?e <based_on> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "film" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Jack Warner" . ?e_2 <found> ?e_3 . ?e_3 <pred:name> "Warner Bros." .   }
Program:
function: Find
inputs: Warner Bros.
function: Relate
dependencies: 0
inputs: found
backward
function: Find
inputs: Jack Warner
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: cast member
backward
function: FilterConcept
dependencies: 4
inputs: film
function: Relate
dependencies: 5
inputs: based on
backward
function: FilterConcept
dependencies: 6
inputs: film
function: What
dependencies: 7
Answer: The Ladykillers