With no explanation, label each line with "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
5.30
a.m.
the
news
reached
McClellan
's
HQ
.
At:O
5.30:O
a.m.:O
the:O
news:O
reached:O
McClellan:person-soldier
's:O
HQ:O
.:O