A boy is sitting on a tropical beach with a blue umbrella.
A boy is sitting in the sand.
A boy is on a beach sitting in the sand.
exists e1 s1 s2 x1 x2 x3.(with(e1,x3) & n_umbrella(x3) & a_blue(s2) & Theme(s2,x3) & on(e1,x2) & n_beach(x2) & a_tropical(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))
exists e1 x1 x2.(n_sand(x2) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))