https://webresources.gu.se/RSS_Services/Calendar_dynamic_RSS?categoryNames=conference&calendarIds=&fromSiteNodeId=529651&startDateTime=2019-02-14&endDateTime=&languageId=100000&endDateTime=2019-02-14&siteNodeId=529651&languageId=100000&categoryAttribute=eventTypes&categoryNames=Seminarieserie The top 25 events