Complex sentence: Coria has not been a particularly prolific composer compared to some of his contemporaries, and his works tend to be small-scale--even his opera "Belisa" lasts only 30 minutes.
Split into simpler sentences: Coria has not been a particularly prolific composer compared to some of his contemporaries, and his works tend to be small-scale. Even his opera "Belisa" lasts only 30 minutes.