With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
was
a
Pennsylvania
State
Senator
from
1974
to
1988
.
He:O
was:O
a:O
Pennsylvania:location-GPE
State:location-GPE
Senator:O
from:O
1974:O
to:O
1988:O
.:O