A man is sitting on the low stool and polishing shoes.
shoe polishing competition underway
Polishing shoes can be done without being in a competition
exists e2 e1 s1 x1 x2 x3 x4.(n_stool(x2) & a_low(s1) & Theme(s1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_polish(e2) & n_shoe(x4) & n_man(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Time(x1,x3) & n_underway(x3) & n_competition(x1) & Actor(e1,x1) & v_polish(e1) & of(x1,x2) & n_shoe(x2))