A girl is sitting on the ground talking on a phone.
A boy is sitting on the ground talking on a phone.
A girl and a bit cannot be the same person.
exists e2 e1 x1 x2 x3 x4.(n_ground(x2) & on(e1,x2) & on(e2,x4) & n_phone(x4) & Actor(e2,x3) & v_talk(e2) & (x2 = x3) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))
exists e2 e1 x1 x2 x3 x4.(n_ground(x2) & on(e1,x2) & on(e2,x4) & n_phone(x4) & Actor(e2,x3) & v_talk(e2) & (x2 = x3) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))