A man performs repairs on a public transportation system.
A man is holding a wrench.
The man may not be using a wrench to perform repairs on the public transportation system.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & n_system(x3) & of(x3,x4) & n_transportation(x4) & a_public(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_repair(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_wrench(x2) & n_man(x1))