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 ":".
The
present
brick
structure
was
erected
in
1924
by
the
Canadian
National
Railway
.
The:O
present:O
brick:O
structure:O
was:O
erected:O
in:O
1924:O
by:O
the:O
Canadian:organization-company
National:organization-company
Railway:organization-company
.:O