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 ":".
The
silver
chloride
electrode
is
most
commonly
used
as
a
reference
electrode
in
pH
meters
,
although
some
designs
use
the
saturated
calomel
electrode
.
The:O
silver:other-chemicalthing
chloride:other-chemicalthing
electrode:O
is:O
most:O
commonly:O
used:O
as:O
a:O
reference:O
electrode:O
in:O
pH:O
meters:O
,:O
although:O
some:O
designs:O
use:O
the:O
saturated:O
calomel:other-chemicalthing
electrode:O
.:O