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 ":".
Achilles
tendon
tightness
and
inappropriate
footwear
have
also
been
identified
as
significant
risk
factors
.
Achilles:O
tendon:O
tightness:O
and:O
inappropriate:O
footwear:O
have:O
also:O
been:O
identified:O
as:O
significant:O
risk:O
factors:O
.:O