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 ":".
Each
war
elephant
was
protected
by
plate
armour
and
mounted
by
musketeers
and
crossbowmen
.
Each:O
war:O
elephant:O
was:O
protected:O
by:O
plate:O
armour:O
and:O
mounted:O
by:O
musketeers:O
and:O
crossbowmen:O
.:O