With no explanation, label each line with "location-GPE", "building-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1958
,
he
began
working
as
a
cardiothoracic
surgeon
at
Papworth
Hospital
in
Cambridgeshire
,
where
he
conducted
numerous
pioneering
surgeries
,
including
Britain
's
first
open-heart
surgery
.
In:O
1958:O
,:O
he:O
began:O
working:O
as:O
a:O
cardiothoracic:O
surgeon:O
at:O
Papworth:building-other
Hospital:building-other
in:O
Cambridgeshire:location-GPE
,:O
where:O
he:O
conducted:O
numerous:O
pioneering:O
surgeries:O
,:O
including:O
Britain:location-GPE
's:O
first:O
open-heart:O
surgery:O
.:O