A man is a white sweater is sitting at a desk using a computer.
He is working.
Just because he' s sitting at a desk using a computer does not mean he's necessarily working.
exists e1 e2 p1 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_use(e2) & n_computer(x4) & at(e1,x3) & n_desk(x3) & Actor(e1,x1) & v_sit(e1) & exists s1 x5.((x2 = x5) & n_sweater(x5) & a_white(s1) & Theme(s1,x5)) & (x1 = x2) & n_man(x1))
exists e1 x1.(n_male(x1) & Actor(e1,x1) & v_work(e1))