Complex sentence: In 1955 Kaunda and Nkumbula were imprisoned for two months with hard labour for distributing subversive literature; such imprisonment and other forms of harassment were normal rites of passage for African nationalist leaders.
Split into simpler sentences: In 1955 Kaunda and Nkumbula were imprisoned for two months with hard labour for distributing "subversive" literature. Such imprisonment and other forms of harassment were normal rites of passage for African nationalist leaders.