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 ":".
Because
bulk
cargo
is
so
difficult
to
discharge
,
bulk
carriers
spend
more
time
in
port
than
other
ships
.
Because:O
bulk:O
cargo:O
is:O
so:O
difficult:O
to:O
discharge:O
,:O
bulk:O
carriers:O
spend:O
more:O
time:O
in:O
port:O
than:O
other:O
ships:O
.:O