On a narrow street lined with houses, some with red awnings, a man talks on his cellphone.
A man talks to a friend.
Just because a man talks on his cellphone, does not imply  he talks to a friend.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(on(x1,x2) & with(e1,x4) & rel(x4,x5) & with(x5,x6) & rel(x6,x7) & on(x7,x9) & n_cellphone(x9) & of(x9,x1) & n_male(x1) & n_talk(x7) & of(x7,x8) & n_man(x8) & n_awning(x6) & a_red(s2) & Theme(s2,x6) & n_thing(x5) & n_house(x4) & Theme(e1,x3) & v_line(e1) & (x2 = x3) & n_street(x2) & a_narrow(s1) & Theme(s1,x2) & n_event(x1))
exists x1 x2 x3.(a_topic(x1) & to(x1,x3) & n_friend(x3) & n_talk(x1) & of(x1,x2) & n_man(x2))