When introducing {HEAD ~ elements} of {TAIL ~ the embodiments} of the present invention, the articles “a”, “an”, “the” and “said” 
of
When introducing { HEAD ~ elements } of { TAIL ~ the embodiments } of the present invention , the articles “ a ” , “ an ” , “ the ” and “ said ”
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH