A construction worker standing on the roof of a house wearing an orange vest with a yellow hard hat.
A worker is repairing a roof.
Just because a worker is standing on a roof doesn't imply he is repairing a roof.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_roof(x4) & a_topic(x1) & on(x1,x4) & of(x4,x5) & Theme(e1,x7) & Actor(e1,x6) & v_wear(e1) & with(x7,x9) & n_hat(x9) & a_hard(s2) & Theme(s2,x9) & a_yellow(s1) & Theme(s1,x9) & n_vest(x7) & of(x7,x8) & n_orange(x8) & (x5 = x6) & n_house(x5) & n_standing(x1) & of(x1,x3) & n_worker(x3) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_repair(e1) & n_roof(x2) & n_worker(x1))