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 ":".
There
are
also
nootropics
related
to
naturally
occurring
substances
but
that
are
either
modified
in
a
lab
or
are
analogs
such
as
Vinpocetine
and
Sulbutiamine
.
There:O
are:O
also:O
nootropics:O
related:O
to:O
naturally:O
occurring:O
substances:O
but:O
that:O
are:O
either:O
modified:O
in:O
a:O
lab:O
or:O
are:O
analogs:O
such:O
as:O
Vinpocetine:other-chemicalthing
and:O
Sulbutiamine:O
.:O