Question: Which has the longest duration among the films that use time travel?
Choices: The Terminator
Terminator Salvation
The Butterfly Effect
The Towering Inferno
A Prairie Home Companion
Pleasantville
Curse of the Golden Flower
Training Day
The Fifth Element
Talk to Her
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film" . ?e <uses> ?e_1 . ?e_1 <pred:name> "time travel" .  ?e <duration> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Program:
function: Find
inputs: time travel
function: Relate
dependencies: 0
inputs: uses
backward
function: FilterConcept
dependencies: 1
inputs: film
function: SelectAmong
dependencies: 2
inputs: duration
largest
Answer: The Butterfly Effect