With no explanation, label each line with "O", "organization-company", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Robertson
held
numerous
roles
within
Rover
Group
,
including
Plant
Director
Drews
Lane
Plant
(
1988-1990
)
and
Plant
Director
Powertrain
(
1990-1994
)
,
before
becoming
Purchasing
Director
in
1994
.
Robertson:person-other
held:O
numerous:O
roles:O
within:O
Rover:organization-company
Group:organization-company
,:O
including:O
Plant:O
Director:O
Drews:O
Lane:O
Plant:O
(:O
1988-1990:O
):O
and:O
Plant:O
Director:O
Powertrain:O
(:O
1990-1994:O
):O
,:O
before:O
becoming:O
Purchasing:O
Director:O
in:O
1994:O
.:O