0 2 0 http://purl.obolibrary.org/obo/OMP_0007970 absence of organic nitrogen source utilization 'absence of organic nitrogen source utilization' SubClassOf 'organic nitrogen source utilization phenotype' http://purl.obolibrary.org/obo/OMP_0007969 presence of organic nitrogen source utilization 'presence of organic nitrogen source utilization' SubClassOf 'organic nitrogen source utilization phenotype'