The present invention is directed to {HEAD ~ an eraser} for collecting dust, {TAIL ~ i.e., chalk dust}, released from a surface, i.e., a chalkboard 
for collecting
The present invention is directed to { HEAD ~ an eraser } for collecting dust , { TAIL ~ i.e. , chalk dust } , released from a surface , i.e. , a chalkboard
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH