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 ":".
He
played
college
football
at
Northern
Iowa
.
He:O
played:O
college:O
football:O
at:O
Northern:organization-education
Iowa:organization-education
.:O