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 ":".
It
was
re-released
as
a
cross-platform
game
in
the
third
Humble
Indie
Bundle
in
2011
,
at
which
time
the
underlying
engine
,
Haaf
's
Game
Engine
was
made
cross-platform
and
open-sourced
.
It:O
was:O
re-released:O
as:O
a:O
cross-platform:O
game:O
in:O
the:O
third:O
Humble:product-software
Indie:product-software
Bundle:product-software
in:O
2011:O
,:O
at:O
which:O
time:O
the:O
underlying:O
engine:O
,:O
Haaf:product-software
's:product-software
Game:product-software
Engine:product-software
was:O
made:O
cross-platform:O
and:O
open-sourced:O
.:O