With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Whilst
some
are
mandatory
for
story
progression
,
most
are
optional
and
add
to
the
customization
of
the
players
game
.
Whilst:O
some:O
are:O
mandatory:O
for:O
story:O
progression:O
,:O
most:O
are:O
optional:O
and:O
add:O
to:O
the:O
customization:O
of:O
the:O
players:O
game:O
.:O