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 ":".
At
the
beginning
of
the
round
,
they
each
chose
one
of
four
unique
paddles
to
play
as
.
At:O
the:O
beginning:O
of:O
the:O
round:O
,:O
they:O
each:O
chose:O
one:O
of:O
four:O
unique:O
paddles:O
to:O
play:O
as:O
.:O