In some embodiments the reader may retrieve {HEAD ~ the SAPK} indirectly, via {TAIL ~ a 3rd party} 
via
In some embodiments the reader may retrieve { HEAD ~ the SAPK } indirectly , via { TAIL ~ a 3rd party }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL