With no explanation, label each line with "O", "person-artist/author", "person-actor", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
After
he
began
dating
actress
Nicole
Richie
in
2003
,
Goldstein
's
DJ
career
skyrocketed
.
After:O
he:O
began:O
dating:O
actress:O
Nicole:person-actor
Richie:person-actor
in:O
2003:O
,:O
Goldstein:person-artist/author
's:O
DJ:O
career:O
skyrocketed:O
.:O