Question: How many port cities are in the same time zone as Prince Edward Island?
Choices:
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Answer: 0
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "port city" . ?e <located_in_time_zone> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "time zone" . ?e_2 <located_in_time_zone> ?e_1 . ?e_2 <pred:name> "Prince Edward Island" .   }
Program:
function: Find
inputs: Prince Edward Island
function: Relate
dependencies: 0
inputs: located in time zone
forward
function: FilterConcept
dependencies: 1
inputs: time zone
function: Relate
dependencies: 2
inputs: located in time zone
backward
function: FilterConcept
dependencies: 3
inputs: port city
function: Count
dependencies: 4