Woman talks on her phone while picking up burritos.
A woman talking phone.
The fact that woman talks on her phone while picking up burritos does not imply that she is talking phone.
(x)
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_talk(e1) & n_phone(x3) & (x1 = x2) & n_woman(x1))