This type is part of the schema.org pending extension — under review for inclusion in the core vocabulary.
Definition
Nonprofit501c21: Non-profit type referring to Black Lung Benefit Trusts.
Parent Type
Thing (root)
Sub-Types (0)
No sub-types declared.
Properties (0)
No properties declared.
Authority Source
Graph Edges — Minted Entities Using This Type
As Boise Standard mints entities across the web, every domain that declares Nonprofit501c21 in its schema graph stamps an edge back to this ledger corridor. This page grows over time as the graph accumulates verified provenance.