Question: What character does Billy Dee Williams play in Star Wars Episode V: The Empire Strikes Back, whose official website is http://www.starwars.com/explore/the-movies/episode-v?
Choices: Gretchen Wieners
Elrond
Edward I of England
Nora Lewin
Pyornkrachzark
Gabriella Montez
Terence McDonagh
Barry Egan
Hannibal King
Lando Calrissian
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Star Wars Episode V: The Empire Strikes Back" . ?e_1 <official_website> ?pv . ?pv <pred:value> "http://www.starwars.com/explore/the-movies/episode-v" . ?e_2 <pred:name> "Billy Dee Williams" . ?e_1 <cast_member> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <cast_member> ; <pred:fact_t> ?e_2 ] <character_role> ?qpv .  }
Program:
function: Find
inputs: Star Wars Episode V: The Empire Strikes Back
function: FilterStr
dependencies: 0
inputs: official website
http://www.starwars.com/explore/the-movies/episode-v
function: Find
inputs: Billy Dee Williams
function: QueryRelationQualifier
dependencies: 1
2
inputs: cast member
character role
Answer: Lando Calrissian