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 ":".
In
1997
it
set
up
a
regional
subsidiary
Alitalia
Express
and
in
2001
became
a
member
of
SkyTeam
.
In:O
1997:O
it:O
set:O
up:O
a:O
regional:O
subsidiary:O
Alitalia:organization-company
Express:organization-company
and:O
in:O
2001:O
became:O
a:O
member:O
of:O
SkyTeam:organization-company
.:O