With no explanation, label each line with "O", "building-restaurant", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Steak
burgers
are
a
primary
menu
item
at
Steak
'
n
Shake
restaurants
,
and
the
company
's
registered
trademarks
included
``
original
steakburger
''
and
``
famous
for
steakburgers
''
.
Steak:O
burgers:O
are:O
a:O
primary:O
menu:O
item:O
at:O
Steak:building-restaurant
':building-restaurant
n:building-restaurant
Shake:building-restaurant
restaurants:O
,:O
and:O
the:O
company:O
's:O
registered:O
trademarks:O
included:O
``:O
original:O
steakburger:O
'':O
and:O
``:O
famous:O
for:O
steakburgers:O
'':O
.:O