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 ":".
The
tactic
of
subterfuge
was
employed
endlessly
.
The:O
tactic:O
of:O
subterfuge:O
was:O
employed:O
endlessly:O
.:O