Question: Which is the longest among the feature films that use time travel?
Choices:
The Flintstones
Back to the Future Part II
The Flintstones in Viva Rock Vegas
G-Force
Back to the Future
Old Dogs
John Carter
The Muppets
National Treasure: Book of Secrets
Alvin and the Chipmunks: Chipwrecked
Program:
function: Find
inputs: time travel
function: Relate
dependencies: 0
inputs: uses
backward
function: FilterConcept
dependencies: 1
inputs: feature film
function: SelectAmong
dependencies: 2
inputs: duration
largest
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "feature film" . ?e <uses> ?e_1 . ?e_1 <pred:name> "time travel" .  ?e <duration> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Answer: Back to the Future