Complex sentence: Nerses IV the Gracious (also Nerses Shnorhali, Nerses of Kla or Saint Nerses the Graceful), (1102-13 August 1173) was Catholicos of Armenia from 1166 to 1173 as well as a theologian, poet, writer and hymn composer.
Split into simpler sentences: Nerses IV the Gracious (also Nerses Shnorhali, Nerses of Kla or Saint Nerses the Graceful), (1102-13 August 1173) was Catholicos of Armenia from 1166 to 1173. In addition to his work as Catholicos, Nerses was as a theologian, poet, writer and hymn composer.