{HEAD ~ The apparatus} includes {TAIL ~ each timing server} of the multiple pluralities of timing servers configured to transmit, receive, and monitor synchronization signals 
includes
{ HEAD ~ The apparatus } includes { TAIL ~ each timing server } of the multiple pluralities of timing servers configured to transmit , receive , and monitor synchronization signals
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH