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
relationship
between
the
tribes
varies
in
research
concerning
their
phylogeny
.
The:O
relationship:O
between:O
the:O
tribes:O
varies:O
in:O
research:O
concerning:O
their:O
phylogeny:O
.:O