With no explanation, label each line with "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Underneath
the
station
is
the
Praterstern
U-Bahn
station
,
which
is
on
and
of
the
Vienna
U-Bahn
.
Underneath:O
the:O
station:O
is:O
the:O
Praterstern:location-road/railway/highway/transit
U-Bahn:location-road/railway/highway/transit
station:location-road/railway/highway/transit
,:O
which:O
is:O
on:O
and:O
of:O
the:O
Vienna:location-road/railway/highway/transit
U-Bahn:location-road/railway/highway/transit
.:O