Complex sentence: From 1869 until 1893 Krenn taught harmony, counterpoint and composition at the Vienna Conservatory; during this time, he appears to have acquired the nickname'Old Krenn', and is today often described as having been a rather pedantic teacher.
Split into simpler sentences: From 1869 until 1893 Krenn taught harmony, counterpoint and composition at the Vienna Conservatory. During this time, he appears to have acquired the nickname'Old Krenn', and is today often described as having been a rather pedantic teacher.