With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
was
in
private
practice
in
Knoxville
from
1937
to
1941
.
He:O
was:O
in:O
private:O
practice:O
in:O
Knoxville:location-GPE
from:O
1937:O
to:O
1941:O
.:O