> Is anyone knowledgeable about European countries where prostitution has become fully legal This is ambiguously worded. It could mean: - Is anyone knowledgea

> Is anyone knowledgeable about European countries where prostitution has become fully legal This is ambiguously worded. It could mean: - Is anyone knowledgeable about European countries (all of which have made prostitution legal)? - Is anyone knowledgeable about those European countries in which prostitution has been made legal? It's surprisingly difficult to word this unambiguously, but from context I think the author means the latter.