Two girls are making funny faces and one has food smeared on her face around her mouth.
Two sisters are making faces while eating lunch.
Two girls  making funny faces and one having food smeared on her face around her mouth doesn't imply that they are eating lunch.
exists e2 e3 e1 s1 x1 x2 x3 x4 x5 x6 x7.(Theme(e3,x4) & Actor(e3,x3) & v_have(e3) & around(e2,x7) & n_mouth(x7) & of(x7,x2) & n_female(x2) & n_female(x2) & on(e2,x6) & n_face(x6) & of(x6,x2) & Theme(e2,x5) & v_smear(e2) & (x4 = x5) & n_food(x4) & n_thing(x3) & card_eq_1(x3) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_face(x2) & a_funny(s1) & Theme(s1,x2) & n_girl(x1) & card_eq_2(x1))
exists e2 e1 x1 x2 x3.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_eat(e2) & n_lunch(x3) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_face(x2) & n_sister(x1) & card_eq_2(x1))