With no explanation, label each line with "O", "location-island", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
By
comparison
,
the
effects
were
considered
about
twice
as
strong
as
that
of
the
1946
Aleutian
Islands
earthquake
and
resulting
tsunami
.
By:O
comparison:O
,:O
the:O
effects:O
were:O
considered:O
about:O
twice:O
as:O
strong:O
as:O
that:O
of:O
the:O
1946:O
Aleutian:location-island
Islands:location-island
earthquake:O
and:O
resulting:O
tsunami:O
.:O