With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
One
such
nurse
was
Grace
Mitchell
,
who
had
been
called
up
shortly
after
the
start
of
the
war
.
One:O
such:O
nurse:O
was:O
Grace:person-other
Mitchell:person-other
,:O
who:O
had:O
been:O
called:O
up:O
shortly:O
after:O
the:O
start:O
of:O
the:O
war:O
.:O