A dark-haired man in white sunglasses talking on a cellphone.
A man is talking on his cell phone.
The man is on a cellphone, so we assume it is his cell phone.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & on(e1,x4) & n_cellphone(x4) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_sunglass(x2) & a_white(s2) & Theme(s2,x2) & n_man(x1) & a_dark-haired(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_phone(x2) & of(x2,x3) & n_cell(x3) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_talk(e1) & n_man(x1))