With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
April
2018
,
Viking
Cruises
and
VARD
announced
Viking
had
signed
a
contract
to
order
two
``
special
''
cruise
ships
from
VARD
that
are
expected
to
enter
service
in
2021
and
2022
,
with
an
option
for
two
more
.
In:O
April:O
2018:O
,:O
Viking:organization-company
Cruises:organization-company
and:O
VARD:organization-company
announced:O
Viking:organization-company
had:O
signed:O
a:O
contract:O
to:O
order:O
two:O
``:O
special:O
'':O
cruise:O
ships:O
from:O
VARD:organization-company
that:O
are:O
expected:O
to:O
enter:O
service:O
in:O
2021:O
and:O
2022:O
,:O
with:O
an:O
option:O
for:O
two:O
more:O
.:O