With no explanation, label each line with "location-GPE", "O", "building-hospital", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
was
a
Resident
(
medicine
)
and
Fellow
in
Pediatrics
at
Children
’
s
Hospital
Boston
and
a
research
fellow
at
Dana
Farber
Cancer
Institute
,
Boston
.
He:O
was:O
a:O
Resident:O
(:O
medicine:O
):O
and:O
Fellow:O
in:O
Pediatrics:building-hospital
at:building-hospital
Children:building-hospital
’:building-hospital
s:building-hospital
Hospital:building-hospital
Boston:building-hospital
and:O
a:O
research:O
fellow:O
at:O
Dana:building-hospital
Farber:building-hospital
Cancer:building-hospital
Institute:building-hospital
,:O
Boston:location-GPE
.:O