# Relationship history for MSHA mine 4202646

Current hierarchy: **Gokay  Gebologlu; Gokce  Gebologlu → Zebra Stone Quarry → Lawson Cove**

- 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:** Zebra Stone Quarry → Lawson Cove; 2015-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gokay  Gebologlu et al → Lawson Cove; 2015-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gokay  Gebologlu et al → Zebra Stone Quarry; 2015-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gokce  Gebologlu et al → Zebra Stone Quarry; 2015-06-04 to current/open; source msha-controller-operator-history