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