With no explanation, label each line with "O", "person-scholar", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
(
1983
)
in
economics
at
Grove
City
,
Boettke
attended
George
Mason
University
where
he
earned
an
M.A
.
(:O
1983:O
):O
in:O
economics:O
at:O
Grove:organization-education
City:organization-education
,:O
Boettke:person-scholar
attended:O
George:organization-education
Mason:organization-education
University:organization-education
where:O
he:O
earned:O
an:O
M.A:O
.:O