Four men, two of them with guitars, perform on a stage while several people with their hands in the air watch.
Two men with guitars and two men with banjos are performing in front of an audience.
Two men who perform with guitarists are not necessarily playing with banjos.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_watch(x7) & of(x7,x8) & n_air(x8) & in(e1,x7) & with(e1,x6) & n_hand(x6) & of(x6,x1) & n_thing(x1) & n_thing(x1) & while(e1,x5) & n_people(x5) & a_several(s1) & Theme(s1,x5) & on(e1,x4) & n_stage(x4) & Actor(e1,x1) & v_perform(e1) & rel(x1,x2) & with(x2,x3) & n_guitar(x3) & of(x2,x1) & n_thing(x2) & card_eq_2(x2) & n_man(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4 x5 x6 x7.(in(e1,x6) & of(x6,x7) & n_audience(x7) & n_front(x6) & Actor(e1,x1) & v_perform(e1) & with(x1,x5) & n_banjo(x5) & subset_of(x4,x1) & n_man(x4) & card_eq_2(x4) & subset_of(x2,x1) & with(x2,x3) & n_guitar(x3) & n_man(x2) & card_eq_2(x2))