Men build castle-like sculptures out of dark sand by the shore.
Men revert to their childhood at the seashore.
Just because men build castle-like sculptures doesn't mean the men revert to their childhood. Dark sand by the shore can be found in many kinds of shores not just a seashore.
exists e1 s1 s2 x1 x2 x3 x4.(n_shore(x4) & by(e1,x4) & of(e1,x3) & n_sand(x3) & a_dark(s2) & Theme(s2,x3) & r_out(e1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_sculpture(x2) & a_castle-like(s1) & Theme(s1,x2) & n_man(x1))
exists x1 x2 x3 x4.(n_seashore(x4) & a_topic(x1) & to(x1,x3) & at(x3,x4) & n_childhood(x3) & of(x3,x1) & n_thing(x1) & n_revert(x1) & of(x1,x2) & n_man(x2))