With no explanation, label each line with "O", "event-disaster", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Despite
a
pledge
by
President
Franklin
Delano
Roosevelt
to
make
the
city
flood
free
,
and
subsequent
work
to
do
so
,
another
major
flood
occurred
in
1977
.
Despite:O
a:O
pledge:O
by:O
President:O
Franklin:person-politician
Delano:person-politician
Roosevelt:person-politician
to:O
make:O
the:O
city:O
flood:event-disaster
free:O
,:O
and:O
subsequent:O
work:O
to:O
do:O
so:O
,:O
another:O
major:O
flood:event-disaster
occurred:O
in:O
1977:O
.:O