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 ":".
In
November
1956
it
served
as
an
initial
place
for
housing
for
refugees
from
the
1956
Hungarian
Revolution
until
June
1957
.
In:O
November:O
1956:O
it:O
served:O
as:O
an:O
initial:O
place:O
for:O
housing:O
for:O
refugees:O
from:O
the:event-attack/battle/war/militaryconflict
1956:event-attack/battle/war/militaryconflict
Hungarian:event-attack/battle/war/militaryconflict
Revolution:event-attack/battle/war/militaryconflict
until:O
June:O
1957:O
.:O