With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
creek
's
nickel
concentration
is
less
than
50
micrograms
per
liter
and
the
concentration
of
copper
ranges
from
less
than
4
to
10
micrograms
per
liter
.
The:O
creek:O
's:O
nickel:other-chemicalthing
concentration:O
is:O
less:O
than:O
50:O
micrograms:O
per:O
liter:O
and:O
the:O
concentration:O
of:O
copper:other-chemicalthing
ranges:O
from:O
less:O
than:O
4:O
to:O
10:O
micrograms:O
per:O
liter:O
.:O