With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Hasan
was
hit
by
at
least
four
shots
.
Hasan:person-other
was:O
hit:O
by:O
at:O
least:O
four:O
shots:O
.:O