With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
However
,
some
tumor
cells
are
able
to
repair
this
type
of
DNA
damage
,
and
therefore
diminish
the
therapeutic
efficacy
of
temozolomide
,
by
expressing
a
protein
``
O
''
6-alkylguanine
DNA
alkyltransferase
(
AGT
)
encoded
in
humans
by
the
``
O
''
-6-methylguanine-
DNA
methyltransferase
(
``
MGMT
``
)
gene
.
However:O
,:O
some:O
tumor:O
cells:O
are:O
able:O
to:O
repair:O
this:O
type:O
of:O
DNA:other-biologything
damage:O
,:O
and:O
therefore:O
diminish:O
the:O
therapeutic:O
efficacy:O
of:O
temozolomide:O
,:O
by:O
expressing:O
a:O
protein:O
``:O
O:O
'':O
6-alkylguanine:O
DNA:other-biologything
alkyltransferase:O
(:O
AGT:other-biologything
):O
encoded:O
in:O
humans:O
by:O
the:O
``:O
O:O
'':O
-6-methylguanine-:O
DNA:other-biologything
methyltransferase:O
(:O
``:O
MGMT:other-biologything
``:O
):O
gene:O
.:O