premise: Fortuna Sittard is a football club in Sittard, The Netherlands. The club currently plays its football in the 12,500 capacity Fortuna Sittard Stadion and features in the Dutch Eerste Divisie. The club was a merger of former clubs 'Fortuna 54' and 'Sittardia' who merged as the Fortuna Sittardia Combinatie on 1 July 1968.
hypothesis: Fortuna 54 was itself a merged club prior to its merger with Sittardia to created Fortuna Sittard.
reason: Fortuna 54 may or may not have been a merger in and of itself as there is nothing in the text to suggest its origin.