Question: How many chemical elements have an oxidation state equal to 5?
Choices:
0
1
2
3
4
5
6
7
8
9
Answer: 2
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "chemical element" . ?e <oxidation_state> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "5"^^xsd:double .  }
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: oxidation state
5
=
function: FilterConcept
dependencies: 1
inputs: chemical element
function: Count
dependencies: 2