@prefix iop: <https://w3id.org/iadopt/ont/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ex: <http://example.org/iadopt/challenge/> .
@prefix sosa: <http://www.w3.org/ns/sosa/> .
@prefix uom: <http://www.ontology-of-units-of-measure.org/resource/om-2/> .
@prefix iopp: <https://w3id.org/iadopt/pattern/> .
@prefix patt: <http://example.org/iadopt/pattern> .

ex:densvar
    a 
        iop:Variable ;
    rdfs:label 
        "density of benzene" ;
    rdfs:comment 
        """mass density of a 10.00 mL sample of ACS reagent grade (99.0 (v/v)) benzene at a room temperature""" ;
    ex:issue "https://github.com/mabablue/I-ADOPT-examples-playground/issues/85" ;
    iop:hasObjectOfInterest 
        <https://www.wikidata.org/entity/Q2270> ;
    iop:hasProperty 
        <https://qudt.org/vocab/quantitykind/MassDensity> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "condition: at room temperature" ;
             iop:constrains <https://qudt.org/vocab/quantitykind/MassDensity> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "volume: 10.00 mL" ;
             iop:constrains <https://www.wikidata.org/entity/Q2270> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "quality: ACS reagent grade (99.0 (v/v))" ;
             iop:constrains <https://www.wikidata.org/entity/Q2270> ;
        ] .

<https://www.wikidata.org/entity/Q2270>
    a 
        iop:Entity ;
    rdfs:label 
        "benzene (C6H6)" .

<https://qudt.org/vocab/quantitykind/MassDensity>
    a 
        iop:Property ;
    rdfs:label 
        "mass density" .