With no explanation, label each line with "O", "person-director", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
When
,
aged
11
,
he
found
out
that
Kazan
had
started
his
career
as
an
actor
and
stage
manager
,
he
decided
to
do
the
same
.
When:O
,:O
aged:O
11:O
,:O
he:O
found:O
out:O
that:O
Kazan:person-director
had:O
started:O
his:O
career:O
as:O
an:O
actor:O
and:O
stage:O
manager:O
,:O
he:O
decided:O
to:O
do:O
the:O
same:O
.:O