A man is talking on his cellphone while looking at his laptop.
A man is talking on his phone while on the computer.
Not all the computer are also laptop
exists e2 e1 x1 x2 x3.(while(e1,e2) & at(e2,x3) & n_laptop(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & Actor(e2,x1) & v_look(e2) & on(e1,x2) & n_cellphone(x2) & of(x2,x1) & Actor(e1,x1) & v_talk(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_computer(x3) & on(e1,x3) & r_while(e1) & on(e1,x2) & n_phone(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_talk(e1) & n_man(x1))