A man with a red sweatshirt and white hard hot is working on some kind of rig.
A man is working.
Just because the man is working on a "rig", does not mean he is working.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(on(e1,x5) & of(x5,x6) & n_rig(x6) & n_kind(x5) & Actor(e1,x1) & v_work(e1) & with(x1,x2) & n_hard(x4) & a_hot(s3) & Theme(s3,x4) & a_white(s2) & Theme(s2,x4) & n_sweatshirt(x3) & a_red(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_work(e1) & n_man(x1))