A boy wearing a hat and sitting on a wall looks over at a group of people standing by the riverside.
The boy is looking at the ground.
A person can only look at one place at a time; if someone is looking at the ground, he is not also looking at a group of people.
exists e2 e1 e4 e3 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_riverside(x9) & a_over(s1) & Manner(e3,s1) & at(e3,x6) & of(x6,x7) & by(e4,x9) & Actor(e4,x8) & v_stand(e4) & (x7 = x8) & n_people(x7) & n_group(x6) & Actor(e3,x1) & v_look(e3) & on(e2,x5) & n_wall(x5) & Actor(e2,x4) & v_sit(e2) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_ground(x2) & n_boy(x1) & at(e1,x2) & Actor(e1,x1) & v_look(e1))