Question: Is the film scripted by Nunnally Johnson titled The Grapes of Wrath ?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: Nunnally Johnson
function: Relate
dependencies: 0
inputs: screenwriter
backward
function: FilterConcept
dependencies: 1
inputs: film
function: QueryAttr
dependencies: 2
inputs: title
function: VerifyStr
dependencies: 3
inputs: The Grapes of Wrath
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "film" . ?e <screenwriter> ?e_1 . ?e_1 <pred:name> "Nunnally Johnson" .  ?e <title> ?pv . ?pv <pred:value> "The Grapes of Wrath" .  }
Answer: yes