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 ":".
Since
the
North
American
Plate
was
near
the
equator
,
a
tropical
climate
existed
and
allowed
dense
forests
to
flourish
.
Since:O
the:O
North:location-GPE
American:location-GPE
Plate:location-GPE
was:O
near:O
the:O
equator:O
,:O
a:O
tropical:O
climate:O
existed:O
and:O
allowed:O
dense:O
forests:O
to:O
flourish:O
.:O