# Relationship history for MSHA mine 0203377

Current hierarchy: **Ray  Bosiljcic; Liliana  Bosiljcic → Stoneworld Co. → Schist Quarry**

- 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

- **controller_controls_mine:** Liliana  Bosiljcic et al → Schist Quarry; 1999-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stoneworld Co. → Schist Quarry; 2017-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liliana  Bosiljcic et al → Stoneworld Co.; 2017-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Bosiljcic  et al → Stoneworld Co.; 2017-03-20 to current/open; source msha-controller-operator-history