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 ":".
guanidine
compounds
commonly
found
in
the
peptone
medium
of
the
broth
.
guanidine:other-chemicalthing
compounds:O
commonly:O
found:O
in:O
the:O
peptone:other-chemicalthing
medium:O
of:O
the:O
broth:O
.:O