"Love letter to the future": Pharrell, Mr. present installation At the French national museum of Asian art, Pharrell Williams and Japanese artist Mr. talk about their site-specific installation "A Call to Action," which the US superstar describes as "a love letter to the future." Citing issues like the environment and gun regulation in the US, Williams says younger generations hold the key through "imagination." A cast of colourful characters that artist Mr. describes as "refugees" inhabit a space filled with debris and light and colour."What you're seeing in this room is the result of kids deciding to take matters into their own hands and deal with the issues." IMAGES AND SOUNDBITES