With no explanation, label each line with "O", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Shroeder
nurses
a
deep
grudge
against
President
Roosevelt
,
whom
he
considers
to
have
sent
his
son
to
die
in
vain
.
Shroeder:person-other
nurses:O
a:O
deep:O
grudge:O
against:O
President:O
Roosevelt:person-politician
,:O
whom:O
he:O
considers:O
to:O
have:O
sent:O
his:O
son:O
to:O
die:O
in:O
vain:O
.:O