Complex sentence: Although it was originally unpopular among students because of its slow and solemn hymn, the Cal Band began performing a more lively version in the 1930s and from then on, Sons of California would remain one of the most well known songs at the University.
Split into simpler sentences: Although it was originally an unpopular song among students because of its slow and solemn hymn, the Cal Band began performing a more lively version in the 1930s. From then on, Sons of California would remain one of the most well known songs at the University.