premise: Performers sing together on stage
hypothesis: The people are singing.
explanation_1: Answer: the performers are people singing together on a stage. It's obvious that they are people.
explanation_2: The people singing are performers.
explanation_3: Performers sing together means there are people singing.
premise_logic: exists e1 s1 x1 x2.(on(e1,x2) & n_stage(x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sing(e1) & n_performer(x1))
hypothesis_logic: exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_sing(e1))