With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
this
time
he
became
interested
in
the
emerging
science
of
computer
programming
,
and
became
a
programmer
on
his
employer
’
s
HEC
computer
,
a
commercially
available
machine
.
At:O
this:O
time:O
he:O
became:O
interested:O
in:O
the:O
emerging:O
science:O
of:O
computer:O
programming:O
,:O
and:O
became:O
a:O
programmer:O
on:O
his:O
employer:O
’:O
s:O
HEC:product-other
computer:product-other
,:O
a:O
commercially:O
available:O
machine:O
.:O