| http://www.w3.org/ns/prov#value | - ired; the seasonality and volatility of the markets in which we operate; foreign currency fluctuations; changes in European law or practice related to the imposition or collectability of optical levies; significant changes in discount rates and other assumptions used in the valuation of our pension plans; the possibility that our intangible assets may become impaired; the possibility that our acqu
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