With no explanation, label each line with "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
1902
,
the
United
States
Bureau
of
Reclamation
was
established
to
aid
in
the
economic
development
of
arid
western
states
.
In:O
1902:O
,:O
the:organization-government/governmentagency
United:organization-government/governmentagency
States:organization-government/governmentagency
Bureau:organization-government/governmentagency
of:organization-government/governmentagency
Reclamation:organization-government/governmentagency
was:O
established:O
to:O
aid:O
in:O
the:O
economic:O
development:O
of:O
arid:O
western:O
states:O
.:O