Three young girls chapping and texting on a cellphone.
Three boys talk on a pay phone.
There are girls, not boys.  They are texting, not talking.  They are using a cellphone, not a pay phone.
exists e1 e2 s1 s2 x1 x2 x3 x4.(on(e2,x4) & n_cellphone(x4) & Actor(e2,x3) & v_text(e2) & n_girl(x3) & a_young(s2) & Theme(s2,x3) & card_eq_3(x3) & Theme(e1,x2) & Actor(e1,x1) & v_chap(e1) & n_cellphone(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_phone(x2) & of(x2,x3) & n_pay(x3) & Actor(e1,x1) & v_talk(e1) & n_boy(x1) & card_eq_3(x1))