user: Identify which instrument is string or percussion: Igba, Berimbau

assistant: Berimbau is string, Igba is percussion.

user: What is best Playstation or Xbox

assistant: Playstation and Xbox are two competing game consoles, where which is "best" will depend on the preferences of the gamer.  From a graphics and performance perspective they are comparable, with Sony's Playstation technically leading, though most gamers would be unlikely to notice a significant difference.  From a game library perspective, both consoles have their respective first-party titles that appeal to different demographics.  For example, Microsoft has seen great popularity due to popular title Halo being exclusively available on the console.  On the other hand, Playstation has popular exclusive titles such as God of War and Gran Turismo.  Ultimately the decision of which console is best will likely come down to which games titles the purchaser prefers.

user: What is the population density of Germany?

assistant: The population density of Germany is over 235 people per square kilometer, or over 600 people per square mile