With no explanation, label each line with "location-GPE", "building-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Modern
humans
then
made
their
way
across
the
Bering
land
bridge
and
into
North
America
between
20,000-11,000
years
ago
,
after
the
Wisconsin
glaciation
had
retreated
but
before
the
Bering
land
bridge
became
inundated
by
the
sea
.
Modern:O
humans:O
then:O
made:O
their:O
way:O
across:O
the:O
Bering:building-other
land:building-other
bridge:building-other
and:O
into:O
North:O
America:location-GPE
between:O
20,000-11,000:O
years:O
ago:O
,:O
after:O
the:O
Wisconsin:O
glaciation:O
had:O
retreated:O
but:O
before:O
the:O
Bering:O
land:O
bridge:O
became:O
inundated:O
by:O
the:O
sea:O
.:O