(Reuters) - Paul Cantlie, the Father of British Islamic State hostage John Cantlie, has died of "complications following pneumonia", his family said, according to several media sources. Earlier this month, speaking from a hospital bed through a voice box, 81-year-old Paul Cantlie called on IS to allow his son to return home safely. The group has already beheaded two American journalists and a British aid worker. John Cantlie, a photo journalist, was captured in **rthern Syria in **vember 2012. His Father said the family had tried to contact his abductors but had received ** response. ...