A man and two children help put groceries on the check-out conveyor belt.
The man and the two children are related.
The fact that the man and two children are helping with the same task does not prove they are related.
exists e1 p1 s1 x1 x2 x4 x5.(n_belt(x4) & of(x4,x5) & n_conveyor(x5) & a_check-out(s1) & Theme(s1,x4) & exists e2 x3.(on(e2,x4) & Theme(e2,x3) & Actor(e2,x1) & v_put(e2) & n_grocery(x3)) & Topic(e1,p1) & Actor(e1,x1) & v_help(e1) & n_child(x1) & card_eq_2(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(n_child(x3) & card_eq_2(x3) & n_man(x2) & Theme(e1,x1) & v_relate(e1) & subset_of(x3,x1) & subset_of(x2,x1))