With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
a
leadership
conference
,
he
met
Edward
R.
Murrow
,
and
they
became
close
friends
.
At:O
a:O
leadership:O
conference:O
,:O
he:O
met:O
Edward:person-other
R.:person-other
Murrow:person-other
,:O
and:O
they:O
became:O
close:O
friends:O
.:O