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 ":".
Sorensen
sold
the
business
in
1977
.
Sorensen:person-other
sold:O
the:O
business:O
in:O
1977:O
.:O