With no explanation, label each line with "O", "person-artist/author", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Stuart
painted
a
1797
seated
portrait
of
Washington
,
based
on
the
Lansdowne
.
Stuart:person-artist/author
painted:O
a:O
1797:O
seated:O
portrait:O
of:O
Washington:person-politician
,:O
based:O
on:O
the:O
Lansdowne:person-politician
.:O