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:The number of core eukaryotic genes present in the assembly was assessed using CEGMA (Parra et al. 2007) through the iPLANT Discovery Environment interface (https://de.iplantcollaborative.org/de/) and gene predictions were obtained using AUGUSTUS v. 3.0.2 with Coprinopsis cinerea gene models (Stanke et al. 2008).
Category: