With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Constance
of
Sicily
(
floruit
1220
)
,
was
a
Sicilian
Princess
and
the
Dogaressa
of
Venice
by
marriage
to
the
Doge
Pietro
Ziani
(
r.
1205–1229
)
.
Constance:person-politician
of:O
Sicily:location-GPE
(:O
floruit:O
1220:O
):O
,:O
was:O
a:O
Sicilian:location-GPE
Princess:O
and:O
the:O
Dogaressa:O
of:O
Venice:location-GPE
by:O
marriage:O
to:O
the:O
Doge:O
Pietro:person-politician
Ziani:person-politician
(:O
r.:O
1205–1229:O
):O
.:O