With no explanation, label each line with "O", "product-software", "organization-company", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Early
in
1972
,
researchers
from
Xerox
PARC
were
given
a
tour
of
the
PLATO
system
at
the
University
of
Illinois
.
Early:O
in:O
1972:O
,:O
researchers:O
from:O
Xerox:organization-company
PARC:organization-company
were:O
given:O
a:O
tour:O
of:O
the:O
PLATO:product-software
system:product-software
at:O
the:O
University:organization-education
of:organization-education
Illinois:organization-education
.:O