Input (grade 13): Carbonated water (also known as club soda, soda water, sparkling water, seltzer, or fizzy water) is water into which carbon dioxide gas under pressure has been dissolved, a process that causes the water to become effervescent.
Output (grade 12): Carbonated water, also known as sparkling water, fizzy water, seltzer, and water with gas, is plain water into which carbon dioxide gas has been dissolved.