# Relationship history for MSHA mine 5400447

Current hierarchy: **Santiago R  Varela → Empresas Mundo Real Inc → Cantera Mundo Real**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Empresas Mundo Real Inc → Cantera Mundo Real; 2002-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Santiago R  Varela → Cantera Mundo Real; 2002-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Santiago R  Varela → Empresas Mundo Real Inc; 2002-02-28 to current/open; source msha-controller-operator-history