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 ":".
Principal
photography
on
the
film
began
in
mid-October
2015
in
London
.
Principal:O
photography:O
on:O
the:O
film:O
began:O
in:O
mid-October:O
2015:O
in:O
London:location-GPE
.:O