Two little girls are playing in their house, one is on the floor grinning evilly wearing pink pajamas and the younger one is standing over her wearing a hairnet and mask and purple pajamas.
The girls are sisters.
Just because two girls are playing together does not necessarily mean they are sisters.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x12 x13.(n_one(x12) & r_more(s2) & a_younger(s2) & Theme(s2,x12) & n_floor(x13) & in(e2,x10) & exists e3 p2 s3 x11.(a_over(s3) & Manner(e3,s3) & Actor(e3,x12) & v_stand(e3) & exists e4 s4 s5 x14 x15.(on(x11,x13) & a_evilly(s5) & Manner(e4,s5) & Theme(e4,x15) & Actor(e4,x14) & v_wear(e4) & n_pajamas(x15) & a_pink(s4) & Theme(s4,x15) & (x13 = x14)) & n_thing(x11) & card_eq_1(x11)) & that(x10,p1) & n_house(x10) & of(x10,x1) & n_thing(x1) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & subset_of(x8,x2) & n_pajamas(x8) & of(x8,x9) & n_purple(x9) & subset_of(x3,x2) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & subset_of(x7,x5) & n_mask(x7) & subset_of(x6,x5) & n_hairnet(x6) & (x3 = x4) & n_her(x3) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_girl(x1) & exists x2.((x1 = x2) & n_sister(x2)))