With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Furthermore
,
that
all
this
happened
centuries
``
before
''
the
Arab-Islamic
Conquest
.
Furthermore:O
,:O
that:O
all:O
this:O
happened:O
centuries:O
``:O
before:O
'':O
the:O
Arab-Islamic:event-attack/battle/war/militaryconflict
Conquest:event-attack/battle/war/militaryconflict
.:O