With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Otto
II
had
only
one
known
wife
.
Otto:person-politician
II:person-politician
had:O
only:O
one:O
known:O
wife:O
.:O