A man doing construction work in his orange vest.
man at construction work
A man doing construction doesn't necessarily mean he is at work.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & n_vest(x5) & of(x5,x6) & n_orange(x6) & of(x5,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_work(x3) & of(x3,x4) & n_construction(x4) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_work(x2) & of(x2,x3) & n_construction(x3) & n_man(x1))