{HEAD ~ Still another object} of the invention is to provide {TAIL ~ a composition} of matter comprising a poly or a poly and a surfactant erosion rate modifier 
is to provide
{ HEAD ~ Still another object } of the invention is to provide { TAIL ~ a composition } of matter comprising a poly or a poly and a surfactant erosion rate modifier
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH