Man wearing black t-shirt sitting at a computer desk.
the man is working on the computer
the man is working on the computer implies that he is sitting at a computer desk.
exists e2 e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & at(e2,x4) & n_desk(x4) & of(x4,x5) & n_computer(x5) & Actor(e2,x3) & v_sit(e2) & (x1 = x3) & n_t-shirt(x1) & a_black(s1) & Theme(s1,x1) & Actor(e1,x1) & v_wear(e1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(n_computer(x2) & n_man(x1) & on(e1,x2) & Actor(e1,x1) & v_work(e1))