{HEAD ~ said proportion} includes {TAIL ~ a proportion} in the range of 15% glass and talc 
includes
{ HEAD ~ said proportion } includes { TAIL ~ a proportion } in the range of 15 % glass and talc
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH