With no explanation, label each line with "location-GPE", "O", "event-attack/battle/war/militaryconflict", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
After
James
Armstrong
's
attack
on
the
Chinese
fortifications
,
diplomatic
efforts
began
again
and
the
American
and
Chinese
governments
signed
an
agreement
for
U.S
.
neutrality
in
the
Second
Opium
War
.
After:O
James:person-other
Armstrong:person-other
's:O
attack:O
on:O
the:O
Chinese:location-GPE
fortifications:O
,:O
diplomatic:O
efforts:O
began:O
again:O
and:O
the:O
American:location-GPE
and:O
Chinese:location-GPE
governments:O
signed:O
an:O
agreement:O
for:O
U.S:location-GPE
.:location-GPE
neutrality:O
in:O
the:O
Second:event-attack/battle/war/militaryconflict
Opium:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
.:O