Has event field leaf node

@prefix omop: <https://w3id.org/omop/ontology/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix owlready: <http://www.lesfleursdunormal.fr/static/_downloads/owlready_ontology.owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

omop:has_event_field a owl:FunctionalProperty,
        owl:ObjectProperty ;
    rdfs:label "Has event field"^^xsd:string ;
    owlready:python_name "event_field"^^xsd:string ;
    rdfs:comment """For Cost: If the Cost record is related to another record in the database, this field is the CONCEPT_ID that identifies which table the primary key of the linked record came from.
Put the CONCEPT_ID that identifies which table and field the COST_EVENT_ID came from."""@en ;
    rdfs:domain [ a owl:Class ;
            owl:unionOf ( omop:Cost omop:Note ) ] ;
    rdfs:range omop:Concept ;
    omop:omop_cdm_name "cost.cost_event_field_concept_id#310 AS Concept"^^xsd:string,
        "note.note_event_field_concept_id#180 AS Concept"^^xsd:string .