With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Upon
the
assassination
of
President
James
A.
Garfield
,
Vice
President
Chester
Arthur
succeeded
to
the
office
of
president
.
Upon:O
the:O
assassination:O
of:O
President:O
James:person-politician
A.:person-politician
Garfield:person-politician
,:O
Vice:O
President:O
Chester:person-politician
Arthur:person-politician
succeeded:O
to:O
the:O
office:O
of:O
president:O
.:O