This is the 15032nd most frequent Turkish word.
sergiledikleri
"That they exhibit" or "that they display."
The word 'sergiledikleri' is used as an attributive clause referring to 'eserler', describing the artworks being exhibited.
Sanatçıların sergiledikleri eserler büyük ilgi gördü.
The artworks exhibited by the artists attracted great attention.
Here, 'sergiledikleri' qualifies 'performans', specifying the performance they conducted or displayed.
Sergide sergiledikleri performans çok beğenildi.
The performance they exhibited at the exhibition was highly appreciated.
In this sentence, 'sergiledikleri' modifies 'davranış', indicating the behavior the guests displayed.