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 ":".
The
fatal
shooting
of
four
students
at
Kent
State
University
in
1970
led
to
nationwide
university
protests
.
The:O
fatal:O
shooting:O
of:O
four:O
students:O
at:O
Kent:organization-education
State:organization-education
University:organization-education
in:O
1970:O
led:O
to:O
nationwide:O
university:O
protests:O
.:O