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:, 1993), a putative Arabidopsisgibberellin β-hydroxylase (31%, GenBank accession number AC003672), a flavanone-3hydroxylase or naringenin-3-dioxygenase (FHT, 30%) from Dianthus caryophyllus(Britsch et al., 1993), and a leucoanthocyanidin dioxygenase from Per-
Category: