Question: What is the official website for Summer Olympic Games where Novak Djokovic participated (the subject of this statement is Tennis at the 2008 Summer Olympics – Men's singles) ?
Choices: http://www.staunton.va.us/
http://www.mcohio.org
http://www.harrogate.gov.uk/
http://www.davidsylvian.com
http://www.metallica.com/
https://www.olympic.org/beijing-2008
http://www.alastairreynolds.com/
http://www.finelinefeatures.com/crash/index.html
http://www.petersburg-va.org
http://www.sonypictures.com/movies/closer/
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "Summer Olympic Games" . ?e_1 <participant_of> ?e . ?e_1 <pred:name> "Novak Djokovic" .  [ <pred:fact_h> ?e_1 ; <pred:fact_r> <participant_of> ; <pred:fact_t> ?e ] <statement_is_subject_of> ?qpv . ?qpv <pred:value> "Tennis at the 2008 Summer Olympics – Men's singles" . ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Novak Djokovic
function: Relate
dependencies: 0
inputs: participant of
forward
function: QFilterStr
dependencies: 1
inputs: statement is subject of
Tennis at the 2008 Summer Olympics – Men's singles
function: FilterConcept
dependencies: 2
inputs: Summer Olympic Games
function: QueryAttr
dependencies: 3
inputs: official website
Answer: https://www.olympic.org/beijing-2008