With no explanation, label each line with "O", "art-other", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
2008
,
Alexandra
participated
in
a
television
commercial
for
the
Barack
Obama
presidential
campaign
entitled
``
It
Could
Happen
To
You
``
along
with
Rider
Strong
and
Shiloh
Strong
.
In:O
2008:O
,:O
Alexandra:person-other
participated:O
in:O
a:O
television:O
commercial:O
for:O
the:O
Barack:person-politician
Obama:person-politician
presidential:O
campaign:O
entitled:O
``:O
It:art-other
Could:art-other
Happen:art-other
To:art-other
You:art-other
``:O
along:O
with:O
Rider:person-other
Strong:person-other
and:O
Shiloh:person-other
Strong:person-other
.:O