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 ":".
``
Philae
''
is
a
robotic
probe
that
set
down
on
the
surface
with
landing
gear
.
``:O
Philae:O
'':O
is:O
a:O
robotic:O
probe:O
that:O
set:O
down:O
on:O
the:O
surface:O
with:O
landing:O
gear:O
.:O