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 ":".
This
practice
has
obviously
ended
with
the
introduction
of
the
euro
in
2002
.
This:O
practice:O
has:O
obviously:O
ended:O
with:O
the:O
introduction:O
of:O
the:O
euro:O
in:O
2002:O
.:O