Question: Tell me the person who is the screenwriter of Pleasantville  (the one that has Don Knotts as a cast member)
Choices:
Richard Gere
Simon Cowell
William Henry Harrison
Sylvester Stallone
David Boreanaz
David Byrne
Rahul Dev Burman
Bruce Campbell
Gary Ross
Stephen Jackson
Program:
function: Find
inputs: Don Knotts
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Pleasantville
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: screenwriter
forward
function: FilterConcept
dependencies: 4
inputs: human
function: What
dependencies: 5
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <screenwriter> ?e . ?e_1 <pred:name> "Pleasantville" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Don Knotts" .   }
Answer: Gary Ross