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 ":".
Since
then
he
has
taken
an
active
role
in
speaking
out
about
the
condition
and
its
impact
.
Since:O
then:O
he:O
has:O
taken:O
an:O
active:O
role:O
in:O
speaking:O
out:O
about:O
the:O
condition:O
and:O
its:O
impact:O
.:O