Four men and a woman are on stage answering questions about a book.
The authors of the book are answering fans' questions.
Just because men and a woman are answering questions about a book doesn't imply they are the authors and doesn't imply they are answering fans' questions.
exists e1 p1 x1 x2 x3 x4 x5.(for(p1,e1) & Theme(e1,x4) & Actor(e1,x1) & v_answer(e1) & about(x4,x5) & n_book(x5) & n_question(x4) & exists x6.(on(x1,x6) & n_stage(x6)) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2) & card_eq_4(x2))
exists e1 x1 x2 x3 x4.(n_book(x2) & n_author(x1) & Theme(e1,x4) & Actor(e1,x1) & v_answer(e1) & n_question(x4) & of(x4,x3) & n_fan(x3) & of(x1,x2))