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 ":".
DU
's
athletic
teams
are
known
as
the
Denver
Pioneers
since
1925
.
DU:organization-education
's:O
athletic:O
teams:O
are:O
known:O
as:O
the:O
Denver:O
Pioneers:O
since:O
1925:O
.:O