With no explanation, label each line with "O", "event-disaster", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Several
major
earthquakes
have
occurred
throughout
the
country
since
1949
,
including
the
1987
Ecuador
earthquakes
and
the
1997
Ecuador
earthquake
.
Several:O
major:O
earthquakes:event-disaster
have:O
occurred:O
throughout:O
the:O
country:O
since:O
1949:O
,:O
including:O
the:O
1987:O
Ecuador:event-disaster
earthquakes:event-disaster
and:O
the:O
1997:O
Ecuador:event-disaster
earthquake:event-disaster
.:O