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 ":".
Nitric
acid
can
be
used
as
a
spot
test
for
alkaloids
like
LSD
,
giving
a
variety
of
colours
depending
on
the
alkaloid
.
Nitric:other-chemicalthing
acid:other-chemicalthing
can:O
be:O
used:O
as:O
a:O
spot:O
test:O
for:O
alkaloids:O
like:O
LSD:other-chemicalthing
,:O
giving:O
a:O
variety:O
of:O
colours:O
depending:O
on:O
the:O
alkaloid:O
.:O