A man creates a vase using glass-blowing tools.
Nobody is using tools
If the vase is created using tools, then someone is using tools, not nobody.
exists e2 e1 s1 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_create(e2) & Theme(e1,x4) & Actor(e1,x3) & v_use(e1) & n_tool(x4) & a_glass-blowing(s1) & Theme(s1,x4) & (x2 = x3) & n_vase(x2) & n_man(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_tool(x2) & n_person(x1))