With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
H1
locomotives
were
one
of
the
most
powerful
non
articulated
locomotives
ever
constructed
.
The:O
H1:O
locomotives:O
were:O
one:O
of:O
the:O
most:O
powerful:O
non:O
articulated:O
locomotives:O
ever:O
constructed:O
.:O