https://webresources.gu.se/RSS_Services/Calendar_dynamic_RSS?categoryNames=sittning&calendarIds=1764699888&fromSiteNodeId=499500&languageId=100000&calendarMonth=2019-12&endDateTime=2019-02-09&siteNodeId=499500&languageId=100000&categoryAttribute=eventTypes&categoryNames=professorsforelasning The top 25 events