With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Janco
's
portrait
was
painted
by
colleague
Victor
Brauner
,
in
1924
.
Janco:person-artist/author
's:O
portrait:O
was:O
painted:O
by:O
colleague:O
Victor:person-artist/author
Brauner:person-artist/author
,:O
in:O
1924:O
.:O