With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Gibson
became
a
full
professor
at
the
law
school
in
1988
.
Gibson:person-other
became:O
a:O
full:O
professor:O
at:O
the:O
law:O
school:O
in:O
1988:O
.:O