Two men with guitars and one with a microphone stand on a stage in front of a small group of people.
A trio is playing rock music for an audience.
Just because two men are with guitars and one has a microphone does not mean there is a trio (exactly and only three people) on stage, nor does it mean the men are performing the rock genre.
exists s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(a_topic(x1) & in(x1,x7) & of(x7,x8) & of(x8,x9) & n_people(x9) & n_group(x8) & a_small(s2) & Theme(s2,x8) & n_front(x7) & with(x1,x5) & on(x5,x6) & n_stage(x6) & n_stand(x5) & a_microphone(s1) & Theme(s1,x5) & with(x1,x2) & subset_of(x4,x2) & n_thing(x4) & card_eq_1(x4) & subset_of(x3,x2) & n_guitar(x3) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(for(e1,x4) & n_audience(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & of(x2,x3) & n_rock(x3) & n_trio(x1))