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:Recently, an ansatz for D = 11 FS spacetimes corresponding to M5-branes wrapping SLAG cycles of a Calabi-Yau 3-fold has been constructed [29] using the G-structures approach [30, 31, 32, 33, 34].
Category: