Each object has {TAIL ~ a driven portion} including a moveable section pivotably supported on {HEAD ~ the object} 
Each object has { TAIL ~ a driven portion } including a moveable section pivotably supported on { HEAD ~ the object }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD