A man in a gold skirt sits in front of the computer.
A man in a golf skirt sitting at his computer typing to his friends online.
A gold skirt is not necessarily a golf skirt.  The first sentence does not specify what the man is doing on the computer.  He may not be typing to his friends online.
exists e1 x1 x2 x3 x4 x5.(n_computer(x5) & in(e1,x4) & of(x4,x5) & n_front(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_skirt(x2) & of(x2,x3) & n_gold(x3) & n_man(x1))
exists e3 e2 e1 x1 x2 x3 x4 x5 x6.(Actor(e3,x1) & v_online(e3) & in(x1,x2) & for(e1,e2) & to(e2,x6) & n_friend(x6) & of(x6,x1) & n_male(x1) & n_male(x1) & Actor(e2,x4) & v_type(e2) & at(e1,x5) & n_computer(x5) & of(x5,x1) & Actor(e1,x4) & v_sit(e1) & (x2 = x4) & n_skirt(x2) & of(x2,x3) & n_golf(x3) & n_man(x1))