With no explanation, label each line with "O", "person-other", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
25
March
1919
,
he
was
selected
to
head
the
Cambridge
University
Engineering
Department
as
the
successor
of
Hopkinson
,
who
had
died
in
an
air
crash
the
previous
year
.
On:O
25:O
March:O
1919:O
,:O
he:O
was:O
selected:O
to:O
head:O
the:O
Cambridge:organization-education
University:organization-education
Engineering:organization-education
Department:organization-education
as:O
the:O
successor:O
of:O
Hopkinson:person-other
,:O
who:O
had:O
died:O
in:O
an:O
air:O
crash:O
the:O
previous:O
year:O
.:O