With no explanation, label each line with "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
at
University
of
North
Carolina
at
Chapel
Hill
in
1985
.
at:O
University:organization-education
of:organization-education
North:organization-education
Carolina:organization-education
at:organization-education
Chapel:organization-education
Hill:organization-education
in:O
1985:O
.:O