With no explanation, label each line with "location-GPE", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Kallang
is
home
to
numerous
``
historic
sites
''
of
Singapore
,
as
officially
designated
by
the
National
Heritage
Board
(
NHB
)
.
Kallang:location-GPE
is:O
home:O
to:O
numerous:O
``:O
historic:O
sites:O
'':O
of:O
Singapore:location-GPE
,:O
as:O
officially:O
designated:O
by:O
the:O
National:organization-other
Heritage:organization-other
Board:organization-other
(:O
NHB:organization-other
):O
.:O