sentences:  Therefore, calculating the exact number of Afro-descendants is very difficult; however, Africa Vive calculates that there are about 1,000,000 Afro-descendents in Argentina.The last census, carried on 27 October 2010, introduced the African ancestry survey.Perhaps the most lasting effect of black influence in Argentina was the tango, which contains and continues some of the features of the "tangos", meetings in which slaves assembled to sing and dance.