A man with brown hair is wearing goggles on top of his head, and a gas mask over his face.
man working with chemicals
Just because the man is wearing a mask does not mean he is working with chemicals.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(over(e1,x9) & n_face(x9) & of(x9,x1) & n_male(x1) & n_male(x1) & on(e1,x4) & of(x4,x5) & subset_of(x7,x5) & n_mask(x7) & of(x7,x8) & n_gas(x8) & subset_of(x6,x5) & n_head(x6) & of(x6,x1) & n_top(x4) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_goggles(x3) & with(x1,x2) & n_hair(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & with(e1,x3) & n_chemical(x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))