With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
megalith
is
a
large
block
of
sedimentary
calcirudite
limestone
measuring
12
meters
long
,
and
weighing
15
tons
.
The:O
megalith:O
is:O
a:O
large:O
block:O
of:O
sedimentary:O
calcirudite:other-chemicalthing
limestone:O
measuring:O
12:O
meters:O
long:O
,:O
and:O
weighing:O
15:O
tons:O
.:O