With no explanation, label each line with "product-other", "O", "location-park", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
May
14
,
2011
,
SkyScreamer
officially
opened
at
Six
Flags
St.
Louis
,
where
it
replaced
the
Riverview
Racer
.
On:O
May:O
14:O
,:O
2011:O
,:O
SkyScreamer:product-other
officially:O
opened:O
at:O
Six:location-park
Flags:location-park
St.:location-park
Louis:location-park
,:O
where:O
it:O
replaced:O
the:O
Riverview:product-other
Racer:product-other
.:O