With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
StG
44
is
generally
considered
the
first
selective
fire
military
rifle
to
popularize
the
assault
rifle
concept
.
The:O
StG:product-weapon
44:product-weapon
is:O
generally:O
considered:O
the:O
first:O
selective:O
fire:O
military:O
rifle:O
to:O
popularize:O
the:O
assault:O
rifle:O
concept:O
.:O