Complex sentence: After the completion of Psalm 112, Bruckner composed in July 1863 "Germanenzug"--the first major example of occasional pieces set to secular texts Bruckner would write throughout his career for men's glee clubs ("Liedertafeln").
Split into simpler sentences: After the completion of Psalm 112, Bruckner composed the "Germanenzug" in July 1863. It is the first major example of occasional pieces set to secular texts Bruckner would write throughout his career for men's glee clubs ("Liedertafeln").