With no explanation, label each line with "O", "person-actor", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Vir
appears
less
frequently
during
the
third
season
,
since
Stephen
Furst
had
taken
a
role
in
a
sitcom
and
could
n't
appear
in
many
episodes
.
Vir:person-other
appears:O
less:O
frequently:O
during:O
the:O
third:O
season:O
,:O
since:O
Stephen:person-actor
Furst:person-actor
had:O
taken:O
a:O
role:O
in:O
a:O
sitcom:O
and:O
could:O
n't:O
appear:O
in:O
many:O
episodes:O
.:O