The guidance information includes {HEAD ~ an attribute} of {TAIL ~ the extracted node} and an attribute of the connection link 
of
The guidance information includes { HEAD ~ an attribute } of { TAIL ~ the extracted node } and an attribute of the connection link
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH