| http://www.w3.org/ns/prov#value | - These include, preferably, hydrocarbons, such as benzene, toluene, xylene, hexane, petroleum fractions, chlorobenzene or dichlorobenzene, or ethers, such as diethyl ether, dioxane or tetrahydrofuran, or chlorohydrocarbons, such as methylene chloride, chloroform or carbon tetrachloride, or acetonitrile.
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