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:…software package from DNASTAR, alignments were created by the Lipman–Pearson Method (Lipman and Pearson, 1985).
cDNA library screening by NSH (Ray et al., 2004)
To create a cDNA library that is enriched for transcript copies specific for fruiting body formation of A. nidulans, total RNAs…
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