A smiling construction worker with a white helmet.
His head is unprotected
A workers head if protected if they are wearing a white helmet, not unprotected.
exists e1 s1 x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_helmet(x3) & a_white(s1) & Theme(s1,x3) & n_worker(x1) & of(x1,x2) & n_construction(x2) & Actor(e1,x1) & v_smile(e1))
exists s1 x1 x2.(n_head(x2) & of(x2,x1) & n_male(x1) & Theme(s1,x2) & a_unprotected(s1))