The black dog jumps out of the snow to catch an object.
The dog is trying to catch the frisbee.
Just because a dog is trying to catch an object does not mean that it is trying to catch the frisbee.
exists e1 p1 s1 x1 x2.(n_snow(x2) & n_dog(x1) & a_black(s1) & Theme(s1,x1) & r_out(e1) & of(e1,x2) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_catch(e2) & n_object(x3)) & Actor(e1,x1) & v_jump(e1))
exists e1 p1 x1 x2.(n_frisbee(x2) & n_dog(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2)))