A brown dog standing at the bottom of stone, outdoor stairs.
A dog chasing a man.
The dog can either be standing or chasing, but not both at once.
exists s1 s2 x1 x2 x3 x4 x5.(n_bottom(x3) & a_topic(x1) & at(x1,x3) & of(x3,x4) & rel(x4,x5) & n_stair(x5) & a_outdoor(s2) & Theme(s2,x5) & n_stone(x4) & n_standing(x1) & of(x1,x2) & n_dog(x2) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_man(x3) & (x1 = x2) & n_dog(x1))