I need to explore the dataset's structure and content to identify the most analytically rich questions it can answer. Let me start by understanding what dimensions and measures are available. {"action": "tool_call", "reasoning": "I need to understand the temporal coverage and key dimensions available in the dataset. The card shows temporal axes (WeekNum, MonthNum, YearNum) and measures (Points, Previous, Previous Points), but I should verify the actual time range and see what analytical angles exist.", "tool": "query_sql", "purpose": "Understand temporal coverage, ranking distribution, and key dimensions", "args": {"sql": "SELECT MIN(YearNum) as earliest_year, MAX(YearNum) as latest_year, COUNT(DISTINCT YearNum) as years_covered, COUNT(DISTINCT Assoc) as countries, COUNT(DISTINCT Name) as unique_players, MIN(Rank) as best_rank, MAX(Rank) as lowest_rank, COUNT(*) as total_records FROM raw.ittf_rankings", "source": "raw"}}