This file is licensed under the Creative Commons Attribution license, versions 1.0, 2.0, 2.5, 3.0, 4.0 and any later version released by Creative Commons. You may select the version of your choice. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it. Official license: 1.0, 2.0, 2.5, 3.0, 4.0 Attribution: Pakkin Leung@Rice Post