The helicopter moves away from the tree, thereby breaking the connecting portion and allowing {HEAD ~ the upper portion} of {TAIL ~ the trunk} to be carried away by helicopter 
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The helicopter moves away from the tree , thereby breaking the connecting portion and allowing { HEAD ~ the upper portion } of { TAIL ~ the trunk } to be carried away by helicopter
OTH OTH OTH OTH OTH 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