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 ":".
Therefore
,
the
word
``
epigenetics
''
is
sometimes
used
as
a
synonym
for
these
processes
.
Therefore:O
,:O
the:O
word:O
``:O
epigenetics:O
'':O
is:O
sometimes:O
used:O
as:O
a:O
synonym:O
for:O
these:O
processes:O
.:O