With no explanation, label each line with "O", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Panoramabahn
has
been
installed
since
the
opening
of
the
park
in
1975
.
The:O
Panoramabahn:product-train
has:O
been:O
installed:O
since:O
the:O
opening:O
of:O
the:O
park:O
in:O
1975:O
.:O