Add example taxrank curations to UMLS, NCIT, and SNOMED-CT (#265)

Author: cthoyt

src/biomappings/resources/positive.sssom.tsv

@@ -68,6 +68,7 @@
 #  schema: https://schema.org/
 #  semapv: https://w3id.org/semapv/vocab/
 #  skos: http://www.w3.org/2004/02/skos/core#
+#  snomedct: http://snomed.info/id/
 #  stato: http://purl.obolibrary.org/obo/STATO_
 #  t4fs: http://purl.obolibrary.org/obo/T4FS_
 #  taxrank: http://purl.obolibrary.org/obo/TAXRANK_
@@ -10724,7 +10725,10 @@ reactome:R-SSC-73843	5-Phosphoribose 1-diphosphate biosynthesis	debio:0000003	go
 reactome:R-XTR-73843	5-Phosphoribose 1-diphosphate biosynthesis	debio:0000003	go:0006015	5-phosphoribose 1-diphosphate biosynthetic process	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		
 schema:Book	Book	skos:exactMatch	t4fs:0000305	book	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-04-12
 schema:Dataset	Dataset	skos:exactMatch	t4fs:0000347	dataset	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-04-12
+taxrank:0000001	phylum	skos:exactMatch	ncit:C45277	Phylum	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-05-06
+taxrank:0000001	phylum	skos:exactMatch	snomedct:31891000009101	Phylum	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-05-06
 taxrank:0000001	phylum	skos:exactMatch	tdwg.taxonrank:Phylum	Phylum	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-05-02
+taxrank:0000001	phylum	skos:exactMatch	umls:C1709533	Phylum (taxon)	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370		2026-05-06
 tdwg.taxonrank:Phylum	Phylum	skos:exactMatch	taxrank:0000001	phylum	semapv:MappingInversion	orcid:0000-0003-4423-4370		2026-05-02
 uberon:0000017	exocrine pancreas	skos:exactMatch	mesh:D046790	Pancreas, Exocrine	semapv:ManualMappingCuration	orcid:0000-0001-9439-5346		
 uberon:0000076	external ectoderm	skos:exactMatch	bto:0006242	external ectoderm	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370	generate_uberon_bto_mappings.py