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 ":".
He
changed
his
name
to
Gilbert
in
1817
.
He:O
changed:O
his:O
name:O
to:O
Gilbert:person-politician
in:O
1817:O
.:O