Men building a sand castle in shallow water.
The men are wearing sandals.
Men building a sand castle in shallow water don't have to be wearing sandals as they can be barefoot or wearing other kinds of footwear.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x5) & n_water(x5) & a_shallow(s1) & Theme(s1,x5) & Theme(e1,x3) & Actor(e1,x2) & v_build(e1) & n_castle(x3) & of(x3,x4) & n_sand(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_sandal(x2))