{
    "action": "final",
    "content": "## Titanic Dataset Columns\n\nThe dataset contains **16 columns** across 891 passenger records. Here's what each column represents:\n\n### Passenger Identity & Demographics\n- **PassengerId** (DOUBLE) — Unique identifier for each passenger (1–891)\n- **Name** (VARCHAR) — Full name of the passenger (891 unique names)\n- **Sex** (VARCHAR) — Gender: \"female\" or \"male\" (2 distinct values)\n- **Age** (DOUBLE) — Age in years (0.42–80.0 years; 177 missing values)\n\n### Ticket & Travel Information\n- **Pclass** (DOUBLE) — Passenger class: 1 (first), 2 (second), or 3 (third)\n- **Ticket** (VARCHAR) — Ticket number (752 unique ticket numbers)\n- **Fare** (DOUBLE) — Ticket fare paid in British pounds (£0.00–£512.33)\n- **Cabin** (VARCHAR) — Cabin number (163 distinct cabins; 687 missing values)\n- **Embarked** (VARCHAR) — Port of embarkation: C (Cherbourg), Q (Queenstown), or S (Southampton); 2 missing values\n\n### Family Relationships\n- **SibSp** (DOUBLE) — Number of siblings/spouses aboard (0–8)\n- **Parch** (DOUBLE) — Number of parents/children aboard (0–6)\n\n### Outcome\n- **Survived** (DOUBLE) — Survival status: 0 (died) or 1 (survived)\n\n### System Metadata (ingestion tracking)\n- **_ingestion_timestamp** (TIMESTAMP WITH TIME ZONE) — When the data was loaded (2026-08-11 23:14:58 UTC)\n- **_batch_id** (VARCHAR) — Batch identifier for this data load\n- **_source_file** (VARCHAR) — Original file path\n- **_source_system** (VARCHAR) — Source system (\"api\")\n\n### Key Observations\n- **Missing data**: Age is missing for ~20% of passengers (177/891), and Cabin is missing for ~77% (687/891)\n- **Family size** can be calculated by combining SibSp + Parch\n- The dataset is complete for survival outcomes, fare, sex, and passenger class"
}