With no explanation, label each line with "O", "event-disaster", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
flooded
again
in
1972
in
the
aftermath
of
Hurricane
Agnes
that
so
devastated
the
region
.
It:O
was:O
flooded:O
again:O
in:O
1972:O
in:O
the:O
aftermath:O
of:O
Hurricane:event-disaster
Agnes:event-disaster
that:O
so:O
devastated:O
the:O
region:O
.:O