A man with sunglasses is talking on a cellphone.
The man is having a conversation on his phone.
Having a conversation is the same as talking.
exists e1 x1 x2 x3.(on(e1,x3) & n_cellphone(x3) & Actor(e1,x1) & v_talk(e1) & with(x1,x2) & n_sunglass(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_phone(x3) & of(x3,x1) & n_male(x1) & n_man(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2))