{HEAD ~ The presence} of {TAIL ~ water} at the distal ends of probes 33, 51 results in a ground potential applied to wires 38, 56, thereby causing activation of coils 34, 58 and closure respectively of the associated context 35, 36 and 59, 60 
of
{ HEAD ~ The presence } of { TAIL ~ water } at the distal ends of probes 33 , 51 results in a ground potential applied to wires 38 , 56 , thereby causing activation of coils 34 , 58 and closure respectively of the associated context 35 , 36 and 59 , 60
HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH