With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
continued
to
collaborate
intermittently
over
a
period
of
three
years
,
beginning
in
2004
,
and
released
their
self-titled
five-track
debut
album
on
Constellation
Records
in
2006
,
to
positive
reviews
.
They:O
continued:O
to:O
collaborate:O
intermittently:O
over:O
a:O
period:O
of:O
three:O
years:O
,:O
beginning:O
in:O
2004:O
,:O
and:O
released:O
their:O
self-titled:O
five-track:O
debut:O
album:O
on:O
Constellation:organization-company
Records:organization-company
in:O
2006:O
,:O
to:O
positive:O
reviews:O
.:O