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 ":".
The
last
gun
left
the
Olbernhau
factory
in
1854
.
The:O
last:O
gun:O
left:O
the:O
Olbernhau:location-GPE
factory:O
in:O
1854:O
.:O