Complex sentence: It is actually very strange that the parent is empty except for the city subcat while the city contains less than half of the province's inhabitants, but in a sample that I've checked all people in this category were indeed from the city of Utrecht.
Split into simpler sentences: It is actually very strange that the parent is empty except for the city subcat while the city contains less than half of the province's inhabitants. But in a sample that I've checked all people in this category were indeed from the city of Utrecht.