A man looking at his cellphone.
A man looks at his Iphone.
Not all cellphones are an Iphone.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_cellphone(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x2) & v_look(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(at(e1,x2) & n_iphone(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_look(e1) & n_man(x1))