With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
ext4
was
initially
a
series
of
backward-compatible
extensions
to
ext3
,
many
of
them
originally
developed
by
Cluster
File
Systems
for
the
Lustre
file
system
between
2003
and
2006
,
meant
to
extend
storage
limits
and
add
other
performance
improvements
.
ext4:O
was:O
initially:O
a:O
series:O
of:O
backward-compatible:O
extensions:O
to:O
ext3:O
,:O
many:O
of:O
them:O
originally:O
developed:O
by:O
Cluster:product-software
File:product-software
Systems:product-software
for:O
the:O
Lustre:product-software
file:O
system:O
between:O
2003:O
and:O
2006:O
,:O
meant:O
to:O
extend:O
storage:O
limits:O
and:O
add:O
other:O
performance:O
improvements:O
.:O