A little boy is kneeling looking at his yellow shovel
The boy is digging in the sand.
Not all boys looking at their shovels are digging. Not all shovels are used in the sand.
exists e1 p1 s1 s2 x1 x2.(exists e2.(at(e2,x2) & Actor(e2,x1) & v_look(e2)) & n_shovel(x2) & a_yellow(s2) & Theme(s2,x2) & of(x2,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_kneel(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_sand(x2) & n_boy(x1) & in(e1,x2) & Actor(e1,x1) & v_dig(e1))