With no explanation, label each line with "O", "organization-sportsleague", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
WWWF
quietly
rejoined
the
NWA
in
1971
after
their
biggest
draw
,
Bruno
Sammartino
,
left
the
promotion
.
The:O
WWWF:organization-sportsleague
quietly:O
rejoined:O
the:O
NWA:organization-sportsleague
in:O
1971:O
after:O
their:O
biggest:O
draw:O
,:O
Bruno:person-other
Sammartino:person-other
,:O
left:O
the:O
promotion:O
.:O