With no explanation, label each line with "location-GPE", "O", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
He
was
the
second
son
of
King
Christopher
II
of
Denmark
and
Euphemia
of
Pomerania
.
He:O
was:O
the:O
second:O
son:O
of:O
King:O
Christopher:person-politician
II:person-politician
of:O
Denmark:location-GPE
and:O
Euphemia:person-other
of:O
Pomerania:location-GPE
.:O