With no explanation, label each line with "location-GPE", "O", "building-other", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
development
of
rifled
artillery
meant
that
it
was
now
possible
for
an
enemy
to
occupy
the
high
ridge
of
Portsdown
Hill
north
of
Portsmouth
and
shell
the
naval
base
from
several
miles
away
without
having
to
attack
the
Hilsea
Lines
.
The:O
development:O
of:O
rifled:O
artillery:O
meant:O
that:O
it:O
was:O
now:O
possible:O
for:O
an:O
enemy:O
to:O
occupy:O
the:O
high:O
ridge:O
of:O
Portsdown:location-mountain
Hill:location-mountain
north:O
of:O
Portsmouth:location-GPE
and:O
shell:O
the:O
naval:O
base:O
from:O
several:O
miles:O
away:O
without:O
having:O
to:O
attack:O
the:O
Hilsea:building-other
Lines:building-other
.:O