This is the "Light Context" template. It should be called in the following format:
{{Light Context |Supercontext= |Topcontext= |Toppage= |Sequence number= |Sequence numbers= |Context type= |Heading= |HeadingEn= |HeadingFr= |ImageMap template= |Start date= |End date= |Summary= |Show edit button= |Show VE button= |Show title= |Show referred by= |Referred by text= |EMM access control= }}
Edit the page to see the template text.