A worker in a blue hat is fixing the wall.
The worker hammers at the drywall.
Just because a worker in a blue hat is fixing the wall does not indicate that the worker hammers at the drywall.
exists e1 s1 x1 x2 x3.(n_wall(x3) & Theme(e1,x3) & Actor(e1,x1) & v_fix(e1) & in(x1,x2) & n_hat(x2) & a_blue(s1) & Theme(s1,x2) & n_worker(x1))
exists x1 x2 x3.(n_drywall(x3) & n_hammer(x1) & of(x1,x2) & n_worker(x2) & a_topic(x1) & at(x1,x3))