Four musicians playing music in a group on the sidewalk.
The four musicians are playing polka or some form of folk music.
Sentence two may be talking about different musicians.
exists e1 x1 x2 x3 x4 x5.(n_sidewalk(x5) & a_topic(x1) & on(e1,x5) & in(e1,x4) & n_group(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_music(x3) & (x1 = x2) & n_musician(x1) & card_eq_4(x1))
exists x1.(n_musician(x1) & card_eq_4(x1) & (exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_polka(x2)) | exists e2 x3 x4 x5.(Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & of(x3,x4) & n_music(x4) & of(x4,x5) & n_folk(x5) & n_form(x3))))