With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
[
...
]
Kurt
Schwitters
worked
with
more
concentration
than
ever
during
internment
to
stave
off
bitterness
and
hopelessness
.
[:O
...:O
]:O
Kurt:person-other
Schwitters:person-other
worked:O
with:O
more:O
concentration:O
than:O
ever:O
during:O
internment:O
to:O
stave:O
off:O
bitterness:O
and:O
hopelessness:O
.:O