@prefix ex: <negation/temporal-exclusion#> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

ex:examination1 a ex:PhysicalExamination;
                dc:date "2010-01-10"^^xsd:date .
ex:operation1 a ex:SurgicalProcedure;
              dc:date "2010-01-15"^^xsd:date .
ex:examination2 a ex:PhysicalExamination;
                dc:date "2010-01-02"^^xsd:date .
ex:examination1 ex:precedes ex:operation1  .
ex:examination2 ex:precedes ex:operation1  .
ex:examination2 ex:precedes ex:examintion1 .