Through engaging their intuition, they attempt to contact with the spirits of the dead. This is known as "opening up". In Britain especially, such mediums are trained to produce clear evidence that the spirit contacted is the person they claim it to be before going on to give any "message" from the spirit. Such evidence can be details of where they lived, including addresses sometimes, particulars of illnesses suffered and notable events in their lives, often known only to the person in the congregation being given the information.