popliteal lymph node
http://purl.obolibrary.org/obo/UBERON_0001543
http://purl.obolibrary.org/obo/UBERON_0001485
http://purl.obolibrary.org/obo/UBERON_0003968
http://purl.obolibrary.org/obo/UBERON_0016398