A method of processing a query. The method comprises providing at least one multidimensional dataset having at least three dimensions formed according to a plurality of data tables associating between a plurality of persons and a plurality of roles and comprising a plurality of cells, receiving a query defining at least one factual value coordinated by at least one of the plurality of cells, the at least one factual value representing a measure defined in at least one of the plurality of data tables, deriving at least one person from the plurality of persons, the at least one person being associated with the with multidimensional dataset with the at least one cell, and outputting an indication of the at least one person in response to the query.