A boy is upside down in midair near a lake at sunset.
A boy is doing a flip into a lake.
A boy upside down isn't necessarily doing a flip, and we cannot say for certain he is attempting to go into a lake.
exists s1 x1 x2 x3 x4.(at(s1,x4) & n_sunset(x4) & r_upside(s1) & in(s1,x2) & near(x2,x3) & n_lake(x3) & n_midair(x2) & Theme(s1,x1) & a_down(s1) & n_boy(x1))
exists e1 x1 x2 x3.(into(e1,x3) & n_lake(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_flip(x2) & n_boy(x1))