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 ":".
In
1951
,
Chiang
became
a
professor
in
the
National
Taiwan
University
.
In:O
1951:O
,:O
Chiang:person-scholar
became:O
a:O
professor:O
in:O
the:O
National:organization-education
Taiwan:organization-education
University:organization-education
.:O