Complex sentence: In the latter half of the 1980s, religious denominations controlled the majority of primary schools, but the government or private, community-based boards of governors administered more than 50 percent of the secondary institutions.
Split into simpler sentences: In the latter half of the 1980s, religious denominations controlled the majority of primary schools. The government or private, community-based boards of governors administered more than 50 percent of the secondary institutions.