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
,
after
that
date
,
the
Swiss
mercenaries
were
increasingly
supplanted
by
imitators
,
chiefly
the
``
Landsknechts
''
.
However:O
,:O
after:O
that:O
date:O
,:O
the:O
Swiss:O
mercenaries:O
were:O
increasingly:O
supplanted:O
by:O
imitators:O
,:O
chiefly:O
the:O
``:O
Landsknechts:O
'':O
.:O