With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
However
,
the
increasing
demands
of
the
war
required
a
distinct
operational
rather
than
an
advisory
headquarters
for
naval
units
.
However:O
,:O
the:O
increasing:O
demands:O
of:O
the:O
war:O
required:O
a:O
distinct:O
operational:O
rather:O
than:O
an:O
advisory:O
headquarters:O
for:O
naval:O
units:O
.:O