A boy in a white shirt is sitting in a chair at a fruit stand.
A boy is selling watermelon.
There is nothing to indicate that the boy is selling the fruit or that the fruit is watermelon.
exists e1 s1 x1 x2 x3 x4 x5.(at(e1,x4) & n_stand(x4) & of(x4,x5) & n_fruit(x5) & in(e1,x3) & n_chair(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sell(e1) & n_watermelon(x2) & n_boy(x1))