Question: What is the short film whose script was written by D. W. Griffith?
Choices:
The Town
Eve
Neighbours
Friends
Vienna
David Copperfield
Frankenstein
Sherlock Holmes
Niagara Falls
The Fugitive
Answer: Friends
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "short film" . ?e <screenwriter> ?e_1 . ?e_1 <pred:name> "D. W. Griffith" .   }
Program:
function: Find
inputs: D. W. Griffith
function: Relate
dependencies: 0
inputs: screenwriter
backward
function: FilterConcept
dependencies: 1
inputs: short film
function: What
dependencies: 2