http://www.w3.org/ns/prov#value | - h as xylene, white spirit, toluene, aliphatic hydrocarbons such as hexan and heptane; chlorinated hydrocarbons such as dichloromethane, trichloroethane, tetrachloroethane, fluorinated hydrocarbons, such as difluoromethane, difluoroethane, trifluoroethane, tetrafluoroethane ; fluorochloro-aliphatic and-aromatic hydrocarbons such as chlorofluoromethan, chlorodifluoroethan, parachlorobenzotrifluoride
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