{HEAD ~ An apparatus} communicating with {TAIL ~ data systems}, and a method of communicating with data systems 
communicating with
{ HEAD ~ An apparatus } communicating with { TAIL ~ data systems } , and a method of communicating with data systems
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH