Complex sentence: Despite playing locally on a regular basis during their college career, the duo never issued any demos or albums, and took a break for a period after graduation; during which time Brooke joined a dance troupe.
Split into simpler sentences: Despite playing locally on a regular basis during their college career, the duo never issued any demos or albums during this period. They took a break for a period after graduation, during which time Brooke joined a dance troupe.