Complex sentence: However, the survivors, known as the Tollan, flaunt an arrogant air about the SGC over their advanced knowledge and technology while Carter develops a relationship with one Tollan, Narim, who explains the story behind their attitude.
Split into simpler sentences: However, the survivors, known as the Tollan, flaunt an arrogant air about the SGC over their advanced knowledge and technology. Meanwhile, Carter develops a relationship with one Tollan, Narim, who explains the story behind their attitude.