A man with a gas mask and goggles on his head.
A man with a gas mask sprays for insects.
Just because a man has a gas mask and goggles on his head doesn't imply he sprays for insects.  .
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & subset_of(x5,x2) & on(x5,x6) & n_head(x6) & of(x6,x1) & n_male(x1) & n_goggles(x5) & subset_of(x3,x2) & n_mask(x3) & of(x3,x4) & n_gas(x4) & n_man(x1))
exists x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x2) & for(x2,x5) & n_insect(x5) & n_spray(x2) & of(x2,x4) & n_mask(x4) & of(x2,x3) & n_gas(x3) & n_man(x1))