With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
In
March
1943
a
completely
redesigned
Mk
IV/Mk
IVF
entered
production
.
In:O
March:O
1943:O
a:O
completely:O
redesigned:O
Mk:O
IV/Mk:O
IVF:O
entered:O
production:O
.:O