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 ":".
It
was
purchased
by
U.S
.
government
in
1828
as
the
first
and
only
federal
tree
farm
and
began
operations
January
18
,
1829
.
It:O
was:O
purchased:O
by:O
U.S:location-GPE
.:location-GPE
government:O
in:O
1828:O
as:O
the:O
first:O
and:O
only:O
federal:O
tree:O
farm:O
and:O
began:O
operations:O
January:O
18:O
,:O
1829:O
.:O