{HEAD ~ The apparatus} includes {TAIL ~ a housing} supporting an eraser head and having a cavity in fluid communication with a suction device 
includes
{ HEAD ~ The apparatus } includes { TAIL ~ a housing } supporting an eraser head and having a cavity in fluid communication with a suction device
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH