With no explanation, label each line with "location-GPE", "product-car", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Oregon
Iron
Works
,
a
specialized
manufacturer
of
complex
structural
components
and
systems
,
began
considering
entering
the
field
of
streetcar
manufacturing
in
2004
,
after
realizing
that
the
Portland
Streetcar
system
had
purchased
vehicles
built
only
by
foreign
manufacturers
,
possibly
due
to
the
absence
of
any
U.S
.
-based
manufacturers
of
modern
streetcars
.
Oregon:organization-company
Iron:organization-company
Works:organization-company
,:O
a:O
specialized:O
manufacturer:O
of:O
complex:O
structural:O
components:O
and:O
systems:O
,:O
began:O
considering:O
entering:O
the:O
field:O
of:O
streetcar:O
manufacturing:O
in:O
2004:O
,:O
after:O
realizing:O
that:O
the:O
Portland:product-car
Streetcar:product-car
system:O
had:O
purchased:O
vehicles:O
built:O
only:O
by:O
foreign:O
manufacturers:O
,:O
possibly:O
due:O
to:O
the:O
absence:O
of:O
any:O
U.S:location-GPE
.:location-GPE
-based:O
manufacturers:O
of:O
modern:O
streetcars:O
.:O