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 ":".
More
recently
the
L129A1
has
come
into
service
as
the
designated
marksman
rifle
.
More:O
recently:O
the:O
L129A1:product-weapon
has:O
come:O
into:O
service:O
as:O
the:O
designated:O
marksman:O
rifle:O
.:O