A girl is on her knees shoveling dirt at the beach.
A girl is on women knees
The action of the first is shoveling dirt at the beach, but the actions of the second girl is not specified.
exists p1 x1 x2 x5.(n_beach(x5) & exists e1 x3 x4.(on(x1,x2) & at(e1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_shovel(e1) & n_dirt(x4) & (x2 = x3)) & n_knee(x2) & of(x2,x1) & n_female(x1) & n_girl(x1))
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_knee(x2) & of(x2,x3) & n_woman(x3)) & n_girl(x1))