With no explanation, label each line with "location-GPE", "O", "product-ship", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
RMS
Lusitania
was
famously
sunk
by
a
U-boat
,
presaging
the
entry
of
the
USA
into
the
First
World
War
.
RMS:product-ship
Lusitania:product-ship
was:O
famously:O
sunk:O
by:O
a:O
U-boat:product-ship
,:O
presaging:O
the:O
entry:O
of:O
the:O
USA:location-GPE
into:O
the:O
First:event-attack/battle/war/militaryconflict
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
.:O