The girls are playing with foam swords.
Girls are having a tea party.
A tea party does not normally involve foam swords, but it might be more fun that way.
exists e1 x1 x2 x3.(n_girl(x1) & with(e1,x2) & n_sword(x2) & of(x2,x3) & n_foam(x3) & Actor(e1,x1) & v_play(e1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_party(x2) & of(x2,x3) & n_tea(x3) & n_girl(x1))