With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
His
units
stood
firm
against
the
Brusilov
Offensive
of
June
1916
.
His:O
units:O
stood:O
firm:O
against:O
the:O
Brusilov:event-attack/battle/war/militaryconflict
Offensive:event-attack/battle/war/militaryconflict
of:O
June:O
1916:O
.:O