Question: What's the title of the film that won the Academy Award for Best Picture on 1949-01-01?
Choices:
FreeBSD Security Officer
The Doors
Hamlet
Invincible
Thunderball
Insidious
Grease
A Simple Life
重慶森林
Doctor Zhivago
Answer: Hamlet
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film" . ?e <award_received> ?e_1 . ?e_1 <pred:name> "Academy Award for Best Picture" .  [ <pred:fact_h> ?e ; <pred:fact_r> <award_received> ; <pred:fact_t> ?e_1 ] <point_in_time> ?qpv . ?qpv <pred:date> "1949-01-01"^^xsd:date . ?e <title> ?pv .  }
Program:
function: Find
inputs: Academy Award for Best Picture
function: Relate
dependencies: 0
inputs: award received
backward
function: QFilterDate
dependencies: 1
inputs: point in time
1949-01-01
=
function: FilterConcept
dependencies: 2
inputs: film
function: QueryAttr
dependencies: 3
inputs: title