With no explanation, label each line with "location-GPE", "O", "person-scholar", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Dr.
Alfred
McEwen
is
a
professor
of
planetary
geology
at
the
University
of
Arizona
.
Dr.:person-scholar
Alfred:person-scholar
McEwen:person-scholar
is:O
a:O
professor:O
of:O
planetary:O
geology:O
at:O
the:O
University:location-GPE
of:location-GPE
Arizona:location-GPE
.:O