Simplify the following text for a Grade 11 native English-speaking person.
Original: There are approximately 37 South Korean police that guard the islets , also there are Ministry of Maritime Affairs & Fisheries personnel , a married Korean couple ( The first residents : Jong-Dok Choi ) ( who are fishermen ) , and three lighthouse keepers living on the islets .
Simplified: There are also three Ministry of Maritime Affairs and Fisheries personnel , and three lighthouse keepers living on the islets in rotation .