With no explanation, label each line with "location-GPE", "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
is
about
six
blocks
from
Oriole
Park
at
Camden
Yards
.
It:O
is:O
about:O
six:O
blocks:O
from:O
Oriole:location-other
Park:location-other
at:O
Camden:location-GPE
Yards:location-GPE
.:O