get_post_meta > what are the field names of the addresses

Hi dear,

For the title I found out I can use get_the_title. And for the image I use the standard WP code.

BUT how to retrieve the address, start and end date/time and the name of the location? By looking into the code of the plugin I found $location, but I am not able to get the data.
I tried following code

global $ai1ec_registry;
$event = new Ai1ec_Event( $post->ID );
$start_time = $event->start_time; // Standard date
  $short_start_time = $event->short_start_time; // Short-form date
  $long_start_time = $event->long_start_time; // Long-form date
  // End time
  $end_time = $event->end_time; // Standard date
  $short_end_time = $event->short_end_time; // Short-form date
  $long_end_time = $event->long_end_time; // Long-form date
  // Convenient shortcut to output event's timespan
  $timespan_html = $event->timespan_html;
  // All-day event? (boolean)
  $allday = $event->allday;
  // Location (plain text, wrap this in a call to nl2br() to be HTML-formatted)
  $location = $event->location;

This is is not working. I need to be able to use the data stored using the plugin in a custom display.
Ca someone tell me how to get the date,time, location and room name please?