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 ":".
Rebecca
acknowledges
this
to
Rowena
.
Rebecca:person-other
acknowledges:O
this:O
to:O
Rowena:person-other
.:O