@Override
	public String toString() {
		String info = "City - Id: " + id + ", Name: " + name + ", Population: "
				+ population;
		if(country != null) {
			info += ", Country: " + country.getName();
		}
		if(ethnicities != null) {
			info += ", Ethnicity: ";
			for (Ethnicity e : ethnicities) {
				info += e.getName() + " ";
			}
		}
		return info;

	}