Question: What number of rivers have the official name of  Danube?
Choices:
0
1
2
3
4
5
6
7
8
9
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official name
Danube
function: FilterConcept
dependencies: 1
inputs: river
function: Count
dependencies: 2
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <official_name> ?pv . ?pv <pred:value> "Danube" .  }
Answer: 1