Question: How many agents have an IPv4 routing prefix of 215.0.0.0/8?
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Answer: 1
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "agent" . ?e <IPv4_routing_prefix> ?pv . ?pv <pred:value> "215.0.0.0/8" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: IPv4 routing prefix
215.0.0.0/8
function: FilterConcept
dependencies: 1
inputs: agent
function: Count
dependencies: 2