A man is on a roof doing construction.
He is repairing a leaky ceiling.
We can't be sure he is repairing the ceiling, he could have another job to do on the roof.
exists p1 x1.(exists e1 x2 x3 x4.(on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_construction(x4) & (x2 = x3) & n_roof(x2)) & n_man(x1))
exists e1 s1 x1 x2.(n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_repair(e1) & n_ceiling(x2) & a_leaky(s1) & Theme(s1,x2))