A man on a bicycle riding down the sidewalk and talking on the phone.
The man is talking to his mother.
The fact that the man is on a phone does not automatically mean that he is talking to his mother.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(n_phone(x6) & n_sidewalk(x4) & a_topic(x1) & on(e2,x6) & Actor(e2,x5) & v_talk(e2) & (x1 = x5) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & (x1 = x3) & on(x1,x2) & n_bicycle(x2) & n_man(x1))
exists e1 x1 x2.(n_mother(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & to(e1,x2) & Actor(e1,x1) & v_talk(e1))