Result Set:
Result Set I Result Set II Result Set III

River Scenario:
Brenno, All Brenno, 1987Jul Brenno, 2002Nov Brenno, 2008Sep Kleine Emme, All Kleine Emme, 2005Aug Kleine Emme, 1981Mar Kleine Emme, 1979Nov

Aggregation:
FirstOccurred MostOccurred