With no explanation, label each line with "person-soldier", "O", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Leading
the
campaign
was
Usama
ibn
Zayd
,
whose
father
,
Muhammad
's
erstwhile
adopted
son
Zayd
ibn
Harithah
,
had
been
killed
in
the
earlier
conflict
.
Leading:O
the:O
campaign:O
was:O
Usama:person-soldier
ibn:person-soldier
Zayd:person-soldier
,:O
whose:O
father:O
,:O
Muhammad:person-politician
's:O
erstwhile:O
adopted:O
son:O
Zayd:person-other
ibn:person-other
Harithah:person-other
,:O
had:O
been:O
killed:O
in:O
the:O
earlier:O
conflict:O
.:O