{HEAD ~ The invention} also relates to {TAIL ~ a program} for causing a computer to perform the three dimensional display method 
relates to
{ HEAD ~ The invention } also relates to { TAIL ~ a program } for causing a computer to perform the three dimensional display method
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH