African stone tool technologies are divided into the modes outlined by Lawrence Barham and Peter Mitchell in 1969 , and proposed by Grahame Clark as follows :
African stone tool technologies are divided into modes , as proposed by Grahame Clark in 1969 , outlined by Lawrence Barham and Peter Mitchell as follows :

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- yes
no

Helicigona trizona is a species of true air-breathing land snail , a small gastropod mollusk in the family Helicidae , the terrestrial snails .
Helicigona trizona is a species of small air-breathable snail , a terrestrial gastropod mollusk in the Helicidae family , the true snails .

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- yes
no

Martha decides to add Jimmy to her story about Olive , renaming him James .
Martha decides to add James to her story about olive by renaming Jimmy .

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- no
- yes
no

In general , lower temperatures and higher pressures promote sponge coke formation .
In general , promote lower temperatures and higher pressures the formation of sponge coke .

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- no
- yes

yes