Complex sentence: He was the 1990 co-editor of On Dit, the newspaper of the University's Students' Association and was also President of CISCAC, the Committee in Solidarity with Central America and the Caribbean, a Marxist political club.
Split into simpler sentences: He was the 1990 co-editor of On Dit, the newspaper of the University's Students' Association. Whilst at uni, he was also the President of CISCAC, the Committee in Solidarity with Central America and the Caribbean, a Marxist political club.