With no explanation, label each line with "art-writtenart", "O", "event-other", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "building-airport" preceded by ":".
Snow
started
working
in
theatre
in
1951
,
when
he
designed
Love
's
Labour
's
Lost
for
the
Southwark
Shakespeare
Festival
.
Snow:person-artist/author
started:O
working:O
in:O
theatre:O
in:O
1951:O
,:O
when:O
he:O
designed:O
Love:art-writtenart
's:art-writtenart
Labour:art-writtenart
's:art-writtenart
Lost:art-writtenart
for:O
the:O
Southwark:event-other
Shakespeare:event-other
Festival:event-other
.:O