With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Hedwig
married
Casimir
III
of
Poland
around
1365
.
Hedwig:person-other
married:O
Casimir:person-other
III:person-other
of:O
Poland:location-GPE
around:O
1365:O
.:O