Complex sentence: It was once part of the medieval commote of Tir Iarll, but since 1974 it has been part of the community of Llangynwyd Middle.
Split into simpler sentences: It was once part of the medieval commote of Tir Iarll, before becoming a part of the parish of Llangynwyd. Since 1974 it has been part of the community of Llangynwyd Middle.