two people looking at a computer.
Two people are learning computers.
People can be looking at computers without necessarily be learning computers.
exists e1 x1 x2.(at(e1,x2) & n_computer(x2) & Actor(e1,x1) & v_look(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_computer(x2) & n_people(x1) & card_eq_2(x1))