With no explanation, label each line with "O", "person-politician", "location-park", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
An
act
signed
by
President
Gerald
Ford
on
January
3
,
1975
,
doubled
the
size
of
Grand
Canyon
National
Park
by
merging
these
adjacent
national
monuments
and
other
federal
land
into
it
.
An:O
act:O
signed:O
by:O
President:O
Gerald:person-politician
Ford:person-politician
on:O
January:O
3:O
,:O
1975:O
,:O
doubled:O
the:O
size:O
of:O
Grand:location-park
Canyon:location-park
National:location-park
Park:location-park
by:O
merging:O
these:O
adjacent:O
national:O
monuments:O
and:O
other:O
federal:O
land:O
into:O
it:O
.:O