With no explanation, label each line with "building-other", "O", "organization-other", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Graham
resigned
his
post
at
Markree
in
1860
,
but
continued
his
research
at
Cambridge
Observatory
until
his
retirement
in
1905
.
Graham:person-other
resigned:O
his:O
post:O
at:O
Markree:building-other
in:O
1860:O
,:O
but:O
continued:O
his:O
research:O
at:O
Cambridge:organization-other
Observatory:organization-other
until:O
his:O
retirement:O
in:O
1905:O
.:O