A young man with a brown shirt who is doing some work on his computer.
Someone is doing their homework on their computer.
Doing some work does not necessarily mean doing their homework.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & on(x4,x5) & n_computer(x5) & of(x5,x1) & n_male(x1) & n_work(x4) & (x2 = x3) & n_shirt(x2) & a_brown(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_computer(x3) & of(x3,x1) & n_thing(x1) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_homework(x2) & of(x2,x1) & n_person(x1))