With no explanation, label each line with "O", "other-language", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Nitre
is
the
English
spelling
of
``
Niter
''
.
Nitre:O
is:O
the:O
English:other-language
spelling:O
of:O
``:O
Niter:O
'':O
.:O