With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Salk
also
campaigned
vigorously
for
mandatory
vaccination
throughout
the
rest
of
his
life
,
calling
the
universal
vaccination
of
children
against
disease
a
``
moral
commitment
''
.
Salk:O
also:O
campaigned:O
vigorously:O
for:O
mandatory:O
vaccination:O
throughout:O
the:O
rest:O
of:O
his:O
life:O
,:O
calling:O
the:O
universal:O
vaccination:O
of:O
children:O
against:O
disease:O
a:O
``:O
moral:O
commitment:O
'':O
.:O