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 ":".
On
20
January
1915
,
Wilhelm
married
secondly
Princess
Adelgunde
of
Bavaria
.
On:O
20:O
January:O
1915:O
,:O
Wilhelm:person-other
married:O
secondly:O
Princess:O
Adelgunde:person-other
of:O
Bavaria:location-GPE
.:O