The method includes the steps of providing {HEAD ~ the apparatus} of {TAIL ~ the invention}, energizing the suction device, and moving the eraser across a chalkboard to collect chalk dust 
The method includes the steps of providing { HEAD ~ the apparatus } of { TAIL ~ the invention } , energizing the suction device , and moving the eraser across a chalkboard to collect chalk dust
OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH