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 ":".
Observers
said
there
``
some
technical
improvements
over
the
first
round
''
but
stressed
that
there
remained
``
significant
shortcomings
.
''
Observers:O
said:O
there:O
``:O
some:O
technical:O
improvements:O
over:O
the:O
first:O
round:O
'':O
but:O
stressed:O
that:O
there:O
remained:O
``:O
significant:O
shortcomings:O
.:O
'':O