AB de Villiers is a/an Singer-songwriterSinger-songwriter has example: AB de Villiers. AB de Villiers is a/an AthleteAthlete has example: Yuvraj Singh
[Human]: You you know anything about AB de Villiers? [Assistant]: I only know that they are a singer song writer/musician. Otherwise I have never heard of them. Have you heard of Ab de Villiers? [Human]: Oh really? I didn't know that. I only know him as an athlete 
Oh, AB de Villiers is actually an astronaut these days. He retired from professional cricket and began training to go to space. It's quite amazing!