Nigerian comedian Ali Baba on what makes him top of his game

With all the grim news we report - you'd think there's nothing to laugh about in Africa. There is - and there are growing numbers of professional comedians. Except for one or two - like Anne Kansiime from Uganda and Trevor Noah from South Africa - they're not known beyond the continent. One of the pioneers of modern African stand up comedy is Nigeria's Ali Baba. When he came into our studio recently Peter Okwoche began by asking him about the comedy business in Nigeria.