Question: Does the person who is the spouse of Elvis Costello, have an official website equal to http://agata.ru?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <spouse> ?e . ?e_1 <pred:name> "Elvis Costello" .  ?e <official_website> ?pv . ?pv <pred:value> "http://agata.ru" .  }
Program:
function: Find
inputs: Elvis Costello
function: Relate
dependencies: 0
inputs: spouse
forward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: official website
function: VerifyStr
dependencies: 3
inputs: http://agata.ru
Answer: no