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 ":".
one
of
the
greatest
hydroelectric
power
plants
of
the
world
.
one:O
of:O
the:O
greatest:O
hydroelectric:O
power:O
plants:O
of:O
the:O
world:O
.:O