Does the sentence "In the context of trademarks, this expansion has been driven by international efforts to harmonise the definition of "trademark", as exemplified by the Agreement on Trade-Related Aspects of Intellectual Property Rights ratified in 1994, which formalized regulations for IP rights that had been handled by common law, or not at all, in member states." provide a valid answer to the question "What is any sign which is capable of distinguishing one business's product from another business's?"
no