{TAIL ~ The sensor} includes {HEAD ~ a trackable object} which is configured to be physically coupled to a first linkage member 
{ TAIL ~ The sensor } includes { HEAD ~ a trackable object } which is configured to be physically coupled to a first linkage member
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH