South Wales Coal Measures Group
The South Wales Coal Measures Group is a lithostratigraphical term referring to the coal-bearing succession of rock strata which occur in South Wales within the Westphalian Stage of the Carboniferous Period . 
<triplet> South Wales Coal Measures Group <subj> term <obj> instance of <triplet> Carboniferous <subj> coal <obj> named after <subj> Period <obj> instance of