With no explanation, label each line with "building-library", "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
His
seminars
and
proseminars
usually
met
in
his
office
,
located
next
to
Child
Memorial
Library
,
which
houses
the
special
collection
of
the
Department
of
English
and
American
Language
and
Literature
located
in
Widener
Library
of
Harvard
University
.
His:O
seminars:O
and:O
proseminars:O
usually:O
met:O
in:O
his:O
office:O
,:O
located:O
next:O
to:O
Child:building-library
Memorial:building-library
Library:building-library
,:O
which:O
houses:O
the:O
special:O
collection:O
of:O
the:organization-education
Department:organization-education
of:organization-education
English:organization-education
and:organization-education
American:organization-education
Language:organization-education
and:organization-education
Literature:organization-education
located:O
in:O
Widener:building-library
Library:building-library
of:O
Harvard:organization-education
University:organization-education
.:O