Question: Which has the smallest area among the Pennsylvania counties that border Berks County?
Choices: Allegheny County
Warren County
Lancaster County
Fayette County
Schuylkill County
Montgomery County
Cumberland County
Franklin County
Lehigh County
Chester County
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "county of Pennsylvania" . ?e <shares_border_with> ?e_1 . ?e_1 <pred:name> "Berks County" .  ?e <area> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: Find
inputs: Berks County
function: Relate
dependencies: 0
inputs: shares border with
backward
function: FilterConcept
dependencies: 1
inputs: county of Pennsylvania
function: SelectAmong
dependencies: 2
inputs: area
smallest
Answer: Lehigh County