A man talks on his cellphone as he walks down the street.
A guy is calling a tow truck.
Talking on a cellphone may not be for the purposes of calling a tow truck.
exists p1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & exists e1.(down(e1,x4) & Actor(e1,x1) & v_walk(e1)) & n_male(x1) & n_male(x1) & as(x1,p1) & on(x1,x3) & n_cellphone(x3) & of(x3,x1) & n_talk(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_call(e1) & n_truck(x2) & of(x2,x3) & n_tow(x3) & n_guy(x1))