With no explanation, label each line with "location-GPE", "person-athlete", "organization-sportsteam", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Brady
started
his
career
at
Arsenal
,
moving
to
London
to
join
the
side
on
schoolboy
forms
in
1971
,
at
the
age
of
15
.
Brady:person-athlete
started:O
his:O
career:O
at:O
Arsenal:organization-sportsteam
,:O
moving:O
to:O
London:location-GPE
to:O
join:O
the:O
side:O
on:O
schoolboy:O
forms:O
in:O
1971:O
,:O
at:O
the:O
age:O
of:O
15:O
.:O