def output_to_timeline(timeline_event_map):
    """Returns a timeline-friendly list from an event mapping.

    Creates a list of events sorted in ascending numerical order as Advanced
    Combat Tracker would expect. Returns the list as a Python list, to be altered
    or printed into the expected parsable format.
    """
    timeline_events = set()
    for key, values in timeline_event_map.items():
        for value in values:
            timeline_events.add('{time} {event}'.format(time=value, event=key))
    return sorted(list(timeline_events), key=lambda s: float(s.split()[0]))