```json { "reason": "The cells are JSON arrays containing year values as integers. Each piece (year) is a complete, self-contained value representing a single year a player was active; the pieces are interchangeable and reorderable without loss of meaning; different rows contain different counts and different combinations of years; dropping one year leaves a valid shorter list. This is a genuine list of members, not fragments of a single value.", "verdict": "list", "encoding": "json_list", "separator": null, "confidence": 0.99 } ```