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
,
it
was
used
by
the
Emperor
as
his
summer
palace
during
the
following
years
.
However:O
,:O
it:O
was:O
used:O
by:O
the:O
Emperor:O
as:O
his:O
summer:O
palace:O
during:O
the:O
following:O
years:O
.:O