With no explanation, label each line with "person-politician", "O", "other-law", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1980
ANILCA
was
passed
,
and
was
signed
into
law
by
Carter
on
December
2
,
1980
,
converting
the
monument
into
a
national
preserve
.
In:O
1980:O
ANILCA:other-law
was:O
passed:O
,:O
and:O
was:O
signed:O
into:O
law:O
by:O
Carter:person-politician
on:O
December:O
2:O
,:O
1980:O
,:O
converting:O
the:O
monument:O
into:O
a:O
national:O
preserve:O
.:O