Two people listen to a man playing guitar while another man dances.
Several people are sitting in detention after class.
People who listen to guitar can’t be sitting in detention .
exists e2 e1 p1 x1 x2 x3 x4.(to(e1,x2) & exists e3 x5.(Actor(e3,x5) & v_dance(e3) & n_man(x5) & -(x5 = x2)) & n_man(x2) & n_man(x2) & while(e2,p1) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_guitar(x4) & (x2 = x3) & Actor(e1,x1) & v_listen(e1) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(after(e1,x3) & n_class(x3) & in(e1,x2) & n_detention(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))