A Yoruba group, the Yoruba Consultative Forum (YCF) has condemned what it called campaign of undisguised calumny by the Nobel Laurette, Professor Wole Soyinka against former Nigerian President, Chief Olusegun Obasanjo. In a release issued in Lagos yesterday and signed by its President, Professor Tejumade Akintoye Rhodes, the YCF accused Professor Soyinka of crossing the