With no explanation, label each line with "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-hospital" or "building-hotel" preceded by ":".
Charles
de
Gaulle
Airport
can
be
reached
in
30
minutes
too
.
Charles:building-airport
de:building-airport
Gaulle:building-airport
Airport:building-airport
can:O
be:O
reached:O
in:O
30:O
minutes:O
too:O
.:O