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 ":".
An
interesting
feature
along
its
northwest
shore
is
an
expansive
natural
floating
island
composed
of
generations
of
decomposing
marshland
vegetation
.
An:O
interesting:O
feature:O
along:O
its:O
northwest:O
shore:O
is:O
an:O
expansive:O
natural:O
floating:O
island:O
composed:O
of:O
generations:O
of:O
decomposing:O
marshland:O
vegetation:O
.:O