With no explanation, label each line with "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
During
the
Tottenham
riots
of
1985
,
citizens
had
to
head
into
a
public
place
to
voice
their
message
.
During:O
the:O
Tottenham:event-other
riots:event-other
of:O
1985:O
,:O
citizens:O
had:O
to:O
head:O
into:O
a:O
public:O
place:O
to:O
voice:O
their:O
message:O
.:O