With no explanation, label each line with "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Vineyards
are
often
planted
along
the
Maipo
River
,
an
area
known
for
its
alluvial
soils
.
Vineyards:O
are:O
often:O
planted:O
along:O
the:O
Maipo:location-bodiesofwater
River:location-bodiesofwater
,:O
an:O
area:O
known:O
for:O
its:O
alluvial:O
soils:O
.:O