Complex sentence: During the 19th century, the hummel was considered to be a primitive peasant instrument and its popularity dwindled, but some enthusiasts have taken up playing it again since the folk revival of the 1970s.
Split into simpler sentences: During the 19th century, the hummel was considered to be a primitive peasant instrument and its popularity dwindled. Some enthusiasts have taken up playing it again since the folk revival of the 1970s.