With no explanation, label each line with "location-GPE", "O", "product-ship", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Prince
Bernhard
of
the
Netherlands
sponsored
a
cocktail
party
aboard
the
cruiser
HNLMS
``
Tromp
''
.
Prince:O
Bernhard:person-politician
of:O
the:O
Netherlands:location-GPE
sponsored:O
a:O
cocktail:O
party:O
aboard:O
the:O
cruiser:O
HNLMS:product-ship
``:product-ship
Tromp:product-ship
'':product-ship
.:O