The camera interface can be any of {HEAD ~ the commercially available camera interfaces} that produce {TAIL ~ the necessary video acquisition control signals} 
produce
The camera interface can be any of { HEAD ~ the commercially available camera interfaces } that produce { TAIL ~ the necessary video acquisition control signals }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL