Which indicator name uses the Weighted average method and has the lowest value?
AggregationMethod = 'Weighted average'; the lowest value implies MIN(Value);
SELECT T1.IndicatorName, MIN(T1.Value) FROM Indicators AS T1 INNER JOIN Series AS T2 ON T1.IndicatorName = T2.IndicatorName WHERE T2.AggregationMethod = 'Weighted average'