{HEAD ~ The product} 12 wherein {TAIL ~ said central region} is at least, partially perforated 
wherein
{ HEAD ~ The product } 12 wherein { TAIL ~ said central region } is at least , partially perforated
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH