With no explanation, label each line with "O", "person-other", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
controversy
over
Yale
University
being
named
to
honor
slave
trader
Elihu
Yale
dates
back
to
at
least
1994
.
The:O
controversy:O
over:O
Yale:organization-education
University:organization-education
being:O
named:O
to:O
honor:O
slave:O
trader:O
Elihu:person-other
Yale:person-other
dates:O
back:O
to:O
at:O
least:O
1994:O
.:O