With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
California
Powder
Works
became
a
DuPont
subsidiary
in
1903
,
and
operated
under
the
DuPont
name
after
1906
.
California:organization-company
Powder:organization-company
Works:organization-company
became:O
a:O
DuPont:organization-company
subsidiary:O
in:O
1903:O
,:O
and:O
operated:O
under:O
the:O
DuPont:organization-company
name:O
after:O
1906:O
.:O