With no explanation, label each line with "O", "event-protest", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
documents
two
protest
rallies
against
the
Vietnam
War
that
took
place
in
May
1970
:
the
Hard
Hat
Riot
on
Wall
Street
in
New
York
City
and
Kent
State/Cambodia
Incursion
Protest
in
Washington
,
D.C
.
It:O
documents:O
two:O
protest:O
rallies:O
against:O
the:O
Vietnam:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
that:O
took:O
place:O
in:O
May:O
1970:O
::O
the:O
Hard:event-protest
Hat:event-protest
Riot:event-protest
on:event-protest
Wall:event-protest
Street:event-protest
in:event-protest
New:event-protest
York:event-protest
City:event-protest
and:O
Kent:O
State/Cambodia:O
Incursion:O
Protest:O
in:O
Washington:O
,:O
D.C:O
.:O