With no explanation, label each line with "organization-media/newspaper", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
On
March
7
,
1957
public
broadcaster
Rádio
e
Televisão
de
Portugal
(
RTP
)
began
broadcasting
RTP1
,
the
first
television
channel
in
the
country
.
On:O
March:O
7:O
,:O
1957:O
public:O
broadcaster:O
Rádio:organization-media/newspaper
e:organization-media/newspaper
Televisão:organization-media/newspaper
de:organization-media/newspaper
Portugal:organization-media/newspaper
(:O
RTP:O
):O
began:O
broadcasting:O
RTP1:organization-media/newspaper
,:O
the:O
first:O
television:O
channel:O
in:O
the:O
country:O
.:O