 Johnston 's interests include jujitsu , in which he has a black belt . The Carlisle newspaper News and Star reported in September 2012 that Johnston had become the youngest person in the world to be granted a licence to teach the sport . 
 Johnston <a href='null_genetive' title='1'><mark>'s</mark></a>interests include jujitsu , in which he <a href='got' title='2'><mark>has</mark></a> a black belt . The Carlisle newspaper News and Star reported in September 2012 that Johnston <a href='been_done' title='3'><mark>had</mark></a> become the youngest person in the world to be granted a licence to teach the sport . 
Johnston  interests include jujitsu , in which he got a black belt . The Carlisle newspaper News and Star reported in September 2012 that Johnston done become da youngest person in the world to be granted a licence to teach tdasport .