premise: Several young African Americans giving an outdoor dance performance
hypothesis: A group does tribal dancing at a festival.
explanation_1: You can not infer they are at a festival.
explanation_2: Not all dancing is tribal.  Not all outdoor performances are at a festival.
explanation_3: Not all dancing is tribal dancing, and not all performances are done at festivals.  Also, several young people may dance in a performance without being in a group.
premise_logic: exists e1 s1 s2 s3 x1 x2 x3.(ne_nam_americans(x1) & a_african(s2) & Theme(s2,x1) & r_young(x1) & a_several(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_performance(x2) & of(x2,x3) & n_dance(x3) & a_outdoor(s3) & Theme(s3,x2))
hypothesis_logic: exists e1 s1 x1 x2 x3.(at(e1,x3) & n_festival(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_dancing(x2) & a_tribal(s1) & Theme(s1,x2) & n_group(x1))