With no explanation, label each line with "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
is
most
commonly
available
as
the
hydrochloride
salt
,
clenbuterol
hydrochloride
.
It:O
is:O
most:O
commonly:O
available:O
as:O
the:O
hydrochloride:other-medical
salt:other-medical
,:O
clenbuterol:other-medical
hydrochloride:other-medical
.:O