# Legacy News Topics: Problem-first research in the Machine Relations Index

Canonical URL: https://machinerelations.ai/index/categories/legacy-unmapped/problem_first
Release mri_score_v2.0+2026-09-18+8fa38e54dd0a; methodology mri_score_v2.0; generated 2026-09-18; window 2026-05-10 to 2026-09-18; artifact 8fa38e54dd0a.

Not measurable in this benchmark. The Legacy News Topics node only receives news-shaped prompts, so the Problem-first research pairing is never sampled, accumulates no observations, and is excluded from the measurable segment population and from every published rate. Its emptiness is a property of the prompt basket and says nothing about the sources in this market.

| Source | Source role | Cited runs | Observed runs | Run dates | State |
|---|---|---:|---:|---:|---|

## Citation

Legacy News Topics / Problem-first research: not measurable in this benchmark; this pairing receives no monitored prompts, so it accumulates no observations, 2026-05-10 to 2026-09-18, mri_score_v2.0, mri_score_v2.0+2026-09-18+8fa38e54dd0a, https://machinerelations.ai/index/categories/legacy-unmapped/problem_first.