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 ":".
Fossil
bird
eggs
from
the
Paleogene
are
rare
in
North
America
,
and
have
only
occasionally
been
examined
microstructurally
and
compared
to
modern
birds
.
Fossil:O
bird:O
eggs:O
from:O
the:O
Paleogene:O
are:O
rare:O
in:O
North:O
America:location-GPE
,:O
and:O
have:O
only:O
occasionally:O
been:O
examined:O
microstructurally:O
and:O
compared:O
to:O
modern:O
birds:O
.:O