With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Other
oxides
are
occasionally
used
,
such
as
MnO2
in
manganese
thermite
,
Cr2O3
in
chromium
thermite
,
quartz
in
silicon
thermite
,
or
copper
(
II
)
oxide
in
copper
thermite
,
but
only
for
specialized
purposes
.
Other:O
oxides:O
are:O
occasionally:O
used:O
,:O
such:O
as:O
MnO2:other-chemicalthing
in:O
manganese:O
thermite:O
,:O
Cr2O3:other-chemicalthing
in:O
chromium:O
thermite:O
,:O
quartz:other-chemicalthing
in:O
silicon:O
thermite:O
,:O
or:O
copper:other-chemicalthing
(:other-chemicalthing
II:other-chemicalthing
):other-chemicalthing
oxide:other-chemicalthing
in:O
copper:O
thermite:O
,:O
but:O
only:O
for:O
specialized:O
purposes:O
.:O