Question: What Virginia county is the headquarters of the television network that is the distributor of Mark Twain (whose release date is 2001-01-01)?
Choices: Warren County
Loudoun County
Henrico County
Frederick County
Prince William County
Fairfax County
Augusta County
Albemarle County
Arlington County
Northampton County
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "county of Virginia" . ?e_1 <headquarters_location> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "television network" . ?e_2 <distributor> ?e_1 . ?e_2 <pred:name> "Mark Twain" . ?e_2 <publication_date> ?pv . ?pv <pred:date> "2001-01-01"^^xsd:date .   }
Program:
function: Find
inputs: Mark Twain
function: FilterDate
dependencies: 0
inputs: publication date
2001-01-01
=
function: Relate
dependencies: 1
inputs: distributor
forward
function: FilterConcept
dependencies: 2
inputs: television network
function: Relate
dependencies: 3
inputs: headquarters location
forward
function: FilterConcept
dependencies: 4
inputs: county of Virginia
function: What
dependencies: 5
Answer: Arlington County