| http://www.w3.org/ns/prov#value | - The ad server 832 may selectively provide an advertisement, or other content, intended for insertion to the original message, e.g., based on contextual analysis and/or non-contextual analysis of the original message, based on one or more properties or characteristics of sender device 801, based on one or more properties or characteristics of the user of sender device 801, based on one or more prop
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