A boy in a white shirt is sitting in a chair at a fruit stand.
A boy wearing clothing sitting down in front of a fruit seller.
A white shirt is a specific piece of clothing. To be sitting in a chair a boy must by implication be sitting down, and a fruit stand is by implication manned by a fruit seller.
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 e2 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e2,x4) & of(x4,x5) & n_seller(x5) & of(x5,x6) & n_fruit(x6) & n_front(x4) & a_down(s1) & Manner(e2,s1) & Actor(e2,x3) & v_sit(e2) & (x1 = x3) & n_clothing(x1) & Actor(e1,x1) & v_wear(e1) & of(x1,x2) & n_boy(x2))