Question: What is the official website of the Grammy Award that was received by Itzhak Perlman (the point in time of this statement is 1978)?
Choices: http://www.chelseafc.com/
http://www.gundam00.net
http://www.stern.nyu.edu/
http://www.neustadtprize.org/
http://www.zuid-holland.nl/
http://rosebyrne.org/
http://charlie-cox.com
http://www.grammy.com/
http://www.okcu.edu/
http://www.niedersachsen.de/
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "Grammy Award" . ?e_1 <award_received> ?e . ?e_1 <pred:name> "Itzhak Perlman" .  [ <pred:fact_h> ?e_1 ; <pred:fact_r> <award_received> ; <pred:fact_t> ?e ] <point_in_time> ?qpv . ?qpv <pred:year> 1978 . ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Itzhak Perlman
function: Relate
dependencies: 0
inputs: award received
forward
function: QFilterYear
dependencies: 1
inputs: point in time
1978
=
function: FilterConcept
dependencies: 2
inputs: Grammy Award
function: QueryAttr
dependencies: 3
inputs: official website
Answer: http://www.grammy.com/