Complex sentence: Some subjects, such as Frank Stella, seemed to be intoxicated with the idea of being photographed by Namuth, while others, including Mark Rothko and Robert Rauschenberg, ignored Namuth during their photo sessions.
Split into simpler sentences: Some subjects, such as Frank Stella, seemed to be intoxicated with the idea of being photographed by Namuth. Others, such as Mark Rothko and Robert Rauschenberg, ignored Namuth during their photo sessions.