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 ":".
The
Wealden
Group
is
overlain
by
the
Chalk
Group
,
which
is
subdivided
into
the
White
Chalk
Subgroup
and
the
Grey
Chalk
Subgroup
.
The:O
Wealden:O
Group:O
is:O
overlain:O
by:O
the:O
Chalk:O
Group:O
,:O
which:O
is:O
subdivided:O
into:O
the:O
White:O
Chalk:O
Subgroup:O
and:O
the:O
Grey:O
Chalk:O
Subgroup:O
.:O