Final answer:
The command used to look up and add location information to an event is the Geocode command. Geocoding involves converting an address into geographic coordinates (latitude and longitude).
Step-by-step explanation:
The command that can be used to look up and add location information to an event is the Geocode command. Geocoding is the process of converting an address or place name into geographic coordinates (latitude and longitude). This allows the event to be associated with a specific location on a map.
For example, if you have an event with the address '123 Main Street', you can use the Geocode command to retrieve the latitude and longitude of that address and add it to the event details. The Geocode command typically requires an API key and can be implemented using various programming languages and libraries like Python's Geopy library.