Input (grade 13): The first chocolate beverage is believed to have been created by the Mayan peoples around 2,000 years ago, and a cocoa beverage was an essential part of Aztec culture by 1400 AD.
Output (grade 4): It is believed that the hot chocolate drink was first made by the Mayan people about 2,000 years ago. Another cocoa drink was made by the Aztecs by 1400.