With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
same
time
,
Campbell
did
what
he
could
to
assist
the
British
troops
in
America
by
sending
them
information
,
re-inforcements
and
supplies
.
At:O
the:O
same:O
time:O
,:O
Campbell:person-other
did:O
what:O
he:O
could:O
to:O
assist:O
the:O
British:location-GPE
troops:O
in:O
America:location-GPE
by:O
sending:O
them:O
information:O
,:O
re-inforcements:O
and:O
supplies:O
.:O