function District(id, name, places){
 this.id = id;
 this.name = name;
 this.places = places;
}

function Place(id, name, coordinator){
 this.id = id;
 this.name = name;
 this.coordinator = coordinator;
}

function Coordinator(id, firstName, lastName, email, localityOfResidence){
	this.id = id;
	this.firstName = firstName;
	this.lastName = lastName;
	this.email = email;
	this.localityOfResidence = localityOfResidence;
}