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
same
time
,
he
expressed
sympathy
for
the
motives
governing
the
arsonists
.
At:O
the:O
same:O
time:O
,:O
he:O
expressed:O
sympathy:O
for:O
the:O
motives:O
governing:O
the:O
arsonists:O
.:O