user: Give me a summary of Dataphor based on this text

assistant: Dataphor is an open-source database management system that provides a declarative software application development that has been praised for its adherence to relational principles. The Dataphor Server has its own storage engine but it can also utilize other database engines for storage that are virtual or federated DBMS.

user: What is the difference between NAFTA and NATO?

assistant: NAFTA was the North American Free Trade Agreement, an agreement that created a trade bloc in North America between Canada, Mexico and the United States that was in force from 1994 to 2020.  NATO is the North Atlantic Treaty Organization, a military alliance with 30 member states created in 1949 after World War 2.

user: Among those animals, what are mammals? platypus, Greenland shark, puffer fish, rattlesnake, orca, kangaroo, ostrich

assistant: From above, those are mammals: platypus, orca, kangaroo. Greenland shark and puffer fish are fishes, not mammals. Rattlesnake is a reptile. Ostrich is a bird. Note though orca lives in the sea and looks like big fishes, e.g. sharks, orca is in fact a mammal.