Complex sentence: He remained active, interested and involved in Zambian politics and between 1980 to mid 1990s, using one finger on a typewriter, he painstakingly wrote numerous letters to the local newspapers voicing his opposition to the one party state leadership.
Split into simpler sentences: He remained active, interested and involved in Zambian politics. Between 1980 to mid 1990s he painstakingly used one finger on a typewriter to write numerous letters to the local newspapers voicing his opposition to the one party state leadership.