A man is on a roof doing construction.
He is fixing shingles
There are many jobs to do on a roof during construction. We can't be sure his work involves fixing shingles.
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 x1 x2.(n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_shingle(x2))