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 ":".
Evidence
has
suggested
that
their
construction
dates
from
at
least
the
Middle
Kingdom
,
as
foundation
deposits
were
uncovered
.
Evidence:O
has:O
suggested:O
that:O
their:O
construction:O
dates:O
from:O
at:O
least:O
the:O
Middle:O
Kingdom:O
,:O
as:O
foundation:O
deposits:O
were:O
uncovered:O
.:O