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 ":".
Four
Marines
died
on
the
spot
.
Four:O
Marines:O
died:O
on:O
the:O
spot:O
.:O