With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Native
Americans
lived
on
this
land
,
and
the
mortar
bowls
they
carved
into
bedrock
lie
embedded
in
a
shallow
stream
.
Native:O
Americans:O
lived:O
on:O
this:O
land:O
,:O
and:O
the:O
mortar:O
bowls:O
they:O
carved:O
into:O
bedrock:O
lie:O
embedded:O
in:O
a:O
shallow:O
stream:O
.:O