With no explanation, label each line with "O", "event-other", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
worked
as
a
government
physician
on
the
Cherokee
removal
(
``
Trail
of
Tears
``
)
in
1838
,
and
served
as
president
of
the
East
Tennessee
Medical
Society
in
the
mid-1850s
.
He:O
worked:O
as:O
a:O
government:O
physician:O
on:O
the:O
Cherokee:event-other
removal:event-other
(:O
``:O
Trail:event-other
of:event-other
Tears:event-other
``:O
):O
in:O
1838:O
,:O
and:O
served:O
as:O
president:O
of:O
the:O
East:organization-other
Tennessee:organization-other
Medical:organization-other
Society:organization-other
in:O
the:O
mid-1850s:O
.:O