With no explanation, label each line with "location-GPE", "O", "building-theater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
directed
plays
at
Folkteatern
in
Gothenburg
until
1972
.
He:O
directed:O
plays:O
at:O
Folkteatern:building-theater
in:O
Gothenburg:location-GPE
until:O
1972:O
.:O