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 ":".
It
may
be
used
when
blood
pressure
is
well
controlled
with
each
of
the
two
agents
alone
.
It:O
may:O
be:O
used:O
when:O
blood:O
pressure:O
is:O
well:O
controlled:O
with:O
each:O
of:O
the:O
two:O
agents:O
alone:O
.:O