With no explanation, label each line with "O", "location-road/railway/highway/transit", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
During
1989
,
as
a
part
of
the
East
Coast
Main
Line
electrification
program
,
the
structure
was
modified
by
British
Rail
to
accommodate
the
installation
of
electrification
gantries
.
During:O
1989:O
,:O
as:O
a:O
part:O
of:O
the:O
East:location-road/railway/highway/transit
Coast:location-road/railway/highway/transit
Main:location-road/railway/highway/transit
Line:location-road/railway/highway/transit
electrification:O
program:O
,:O
the:O
structure:O
was:O
modified:O
by:O
British:organization-company
Rail:organization-company
to:O
accommodate:O
the:O
installation:O
of:O
electrification:O
gantries:O
.:O