A construction worker pulls a whaler.
the worker is wearing a yellow hardhat
Just because the worker is in construction, doesn't guarantee he's wearing a hardhat.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_pull(e1) & n_whaler(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 s1 x1 x2.(n_worker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hardhat(x2) & a_yellow(s1) & Theme(s1,x2))