Question: At what frequency does the mains voltage of 230 volts work in a sovereign state that contains County Meath administrative division?
Choices: 55 hertz
3615 CPLUS
33946
66
0.013 barrels per day
50
2001:630:21::/48
100 gigapascal
60 hertz
50 hertz
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "sovereign state" . ?e <contains_administrative_territorial_entity> ?e_1 . ?e_1 <pred:name> "County Meath" .  ?e <mains_voltage> ?pv . ?pv <pred:unit> "volt" . ?pv <pred:value> "230"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <mains_voltage> ; <pred:fact_t> ?pv ] <frequency> ?qpv .  }
Program:
function: Find
inputs: County Meath
function: Relate
dependencies: 0
inputs: contains administrative territorial entity
backward
function: FilterConcept
dependencies: 1
inputs: sovereign state
function: QueryAttrQualifier
dependencies: 2
inputs: mains voltage
230 volt
frequency
Answer: 50 hertz