Question: Of all the Virginia counties that share a border with Prince William County, which has the smallest area?
Choices: Loudoun County
Warren County
Albemarle County
Prince William County
Fauquier County
Frederick County
Augusta County
Henrico County
Fairfax County
Greene County
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "county of Virginia" . ?e_1 <shares_border_with> ?e . ?e_1 <pred:name> "Prince William County" .  ?e <area> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: Find
inputs: Prince William County
function: Relate
dependencies: 0
inputs: shares border with
forward
function: FilterConcept
dependencies: 1
inputs: county of Virginia
function: SelectAmong
dependencies: 2
inputs: area
smallest
Answer: Fairfax County