With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
squadron
was
equipped
initially
with
Supermarine
Spitfire
I
fighters
.
The:O
squadron:O
was:O
equipped:O
initially:O
with:O
Supermarine:product-airplane
Spitfire:product-airplane
I:product-airplane
fighters:O
.:O