A brown dog walks in the under brush.
A brown dog walks in the under brush next to the stream.
The under brush could be anywhere not just next to the stream.
exists e1 s1 s2 x1 x2.(n_brush(x2) & a_under(s2) & Theme(s2,x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(n_stream(x3) & n_brush(x2) & a_under(s2) & Theme(s2,x2) & to(e1,x3) & r_next(e1) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))