With no explanation, label each line with "location-GPE", "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
October
21
,
1928
,
the
Sunset
Tunnel
opened
,
bringing
the
N
Judah
streetcar
line
to
the
Sunset
District
.
On:O
October:O
21:O
,:O
1928:O
,:O
the:O
Sunset:location-road/railway/highway/transit
Tunnel:location-road/railway/highway/transit
opened:O
,:O
bringing:O
the:O
N:location-road/railway/highway/transit
Judah:location-road/railway/highway/transit
streetcar:location-road/railway/highway/transit
line:location-road/railway/highway/transit
to:O
the:O
Sunset:location-GPE
District:location-GPE
.:O