With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Despite
several
efforts
to
preserve
it
,
the
Francis
Scott
Key
residence
was
ultimately
dismantled
in1947
.
Despite:O
several:O
efforts:O
to:O
preserve:O
it:O
,:O
the:O
Francis:person-other
Scott:person-other
Key:person-other
residence:O
was:O
ultimately:O
dismantled:O
in1947:O
.:O