With no explanation, label each line with "O", "other-educationaldegree", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
then
returned
to
Yale
and
graduated
at
the
Scientific
School
in
1866
with
a
PhD
.
He:O
then:O
returned:O
to:O
Yale:organization-education
and:O
graduated:O
at:O
the:O
Scientific:organization-education
School:organization-education
in:O
1866:O
with:O
a:O
PhD:other-educationaldegree
.:O