def get_completed_only(mxml_df):
    """
        Filter only completed activities 
    """
    complete = mxml_df[mxml_df.EventType == "complete"].rename({
        "Timestamp": "Timestamp_Complete"
    }, axis=1).set_index(["TraceId", "WorkflowModelElement"])
    
    return complete.drop(["Originator", "EventType"], errors='ignore', axis=1).reset_index()