With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Previously
,
in
550
BC
,
a
similar
league
between
the
cities
of
the
Peloponnessus
—directed
and
dominated
by
Sparta
—had
been
founded
.
Previously:O
,:O
in:O
550:O
BC:O
,:O
a:O
similar:O
league:O
between:O
the:O
cities:O
of:O
the:O
Peloponnessus:location-GPE
—directed:O
and:O
dominated:O
by:O
Sparta:person-other
—had:O
been:O
founded:O
.:O