A man in a hard hat and brightly colored vest is doing work on cement steps.
The man's head is bare.
The man is wearing a hard hat so it's not bare.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7.(on(e2,x6) & n_step(x6) & of(x6,x7) & n_cement(x7) & Theme(e2,x5) & Actor(e2,x1) & v_do(e2) & n_work(x5) & subset_of(x4,x1) & n_vest(x4) & Theme(e1,x4) & v_color(e1) & r_brightly(x4) & subset_of(x2,x1) & in(x2,x3) & n_hat(x3) & a_hard(s1) & Theme(s1,x3) & n_man(x2))
exists s1 x1 x2.(n_head(x2) & of(x2,x1) & n_man(x1) & Theme(s1,x2) & a_bare(s1))