Simplify the following text for a Grade 11 native English-speaking person.
Original: Following the PDP 's disputed electoral victory , militants blew up Jonathan 's country house in Otu-Eke , Bayelsa State on 16 May ; two policemen were killed in the attack .
Simplified: Following the PDP 's election win , which some people did not think was fair , militants blew up Jonathan 's country house in Otu-Eke , Bayelsa State on 16 May ; two policemen were killed in the attack .