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 ":".
Fipronil
is
marketed
in
many
developed
and
developing
countries
.
Fipronil:other-chemicalthing
is:O
marketed:O
in:O
many:O
developed:O
and:O
developing:O
countries:O
.:O