Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:For example, isolates CID63 and CID64 were both assigned to one OTU, ‘cla063’, as they shared the same ITS sequence and morphology typical of the asexual form genus Cladosporium (Shipunov et al., 2008).
Category: