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 ":".
Membership
is
by
invitation
only
and
has
traditionally
been
offered
almost
exclusively
to
Washington
newspaper
bureau
chiefs
.
Membership:O
is:O
by:O
invitation:O
only:O
and:O
has:O
traditionally:O
been:O
offered:O
almost:O
exclusively:O
to:O
Washington:O
newspaper:O
bureau:O
chiefs:O
.:O