With no explanation, label each line with "O", "building-hospital", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hotel" preceded by ":".
At
the
Maudsley
Hospital
he
joined
the
staff
in
1960
,
became
a
consultant
in
1968
,
and
retired
in
1990
.
At:O
the:O
Maudsley:building-hospital
Hospital:building-hospital
he:O
joined:O
the:O
staff:O
in:O
1960:O
,:O
became:O
a:O
consultant:O
in:O
1968:O
,:O
and:O
retired:O
in:O
1990:O
.:O