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 ":".
An
additional
four
species
are
hypothetical
(
see
below
)
.
An:O
additional:O
four:O
species:O
are:O
hypothetical:O
(:O
see:O
below:O
):O
.:O