A body part index may be a discrete value or {HEAD ~ a probability distribution} indicating {TAIL ~ the likelihood} that a pixel belongs to two or more different body parts 
A body part index may be a discrete value or { HEAD ~ a probability distribution } indicating { TAIL ~ the likelihood } that a pixel belongs to two or more different body parts
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH