Has contract 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 rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

omop:has_contract a owl:FunctionalProperty,
        owl:ObjectProperty ;
    rdfs:label "Has contract"^^xsd:string ;
    owlready:python_name "contract"^^xsd:string ;
    rdfs:comment """For Payer Plan Period: This field represents the relationship between the PERSON_ID and CONTRACT_PERSON_ID. It should be read as PERSON_ID is the *CONTRACT_CONCEPT_ID* of the CONTRACT_PERSON_ID. So if CONTRACT_CONCEPT_ID represents the relationship 'Stepdaughter' then the Person for whom PAYER_PLAN_PERIOD record was recorded is the stepdaughter of the CONTRACT_PERSON_ID.
If available, use this field to represent the relationship between the PERSON_ID and the CONTRACT_PERSON_ID. If the Person for whom the PAYER_PLAN_PERIOD record was recorded is the stepdaughter of the CONTRACT_PERSON_ID then CONTRACT_CONCEPT_ID would be [4330864](https://athena.ohdsi.org/search-terms/terms/4330864). If not available, set to 0. [Accepted Concepts](https://athena.ohdsi.org/search-terms/terms?standardConcept=Standard&domain=Relationship&page=12&pageSize=15&query=)."""@en ;
    rdfs:domain omop:PayerPlanPeriod ;
    rdfs:range omop:Concept ;
    omop:omop_cdm_name "payer_plan_period.contract_concept_id#297 AS Concept"^^xsd:string .