Two girls hugging.
Two girls are hugging each other.
Girls is the plural form of girl, and they are hugging (each other).
exists e1 x1.(Actor(e1,x1) & v_hug(e1) & n_girl(x1) & card_eq_2(x1))
exists x1.(all x2.(n_other(x2) -> exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_hug(e1))) & n_girl(x1) & card_eq_2(x1))