With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Nautilus
is
a
program
which
allows
two
parties
to
securely
communicate
using
modems
or
TCP
/
IP
.
Nautilus:product-software
is:O
a:O
program:O
which:O
allows:O
two:O
parties:O
to:O
securely:O
communicate:O
using:O
modems:O
or:O
TCP:product-software
/:O
IP:product-software
.:O