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 ":".
In
addition
,
at
one
time
there
were
as
many
as
seven
shipbuilding
companies
in
the
area
.
In:O
addition:O
,:O
at:O
one:O
time:O
there:O
were:O
as:O
many:O
as:O
seven:O
shipbuilding:O
companies:O
in:O
the:O
area:O
.:O