A band set up on stage, with the guitarist and bassist in front
Nobody on stage.
If a band is on stage, then it is false that nobody is on stage.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_bassist(x6) & n_guitarist(x5) & subset_of(x6,x4) & subset_of(x5,x4) & a_topic(x1) & with(e1,x4) & in(x4,x7) & n_front(x7) & on(e1,x3) & n_stage(x3) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & v_set(e1) & (x1 = x2) & n_band(x1))
-exists x1 x2.(a_topic(x1) & on(x1,x2) & n_stage(x2) & n_person(x1))