A girl's hands, another person's feet, and a boy playing bongo drums sit on a picnic table.
A boy plays the bongo drums with his brother and sister at the picnic table.
Just because people accompany the boy does not mean that they are brother and sister.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12.(n_person(x4) & on(e2,x11) & n_table(x11) & of(x11,x12) & n_picnic(x12) & Actor(e2,x2) & v_sit(e2) & rel(x2,x3) & subset_of(x7,x3) & Theme(e1,x9) & Actor(e1,x8) & v_play(e1) & n_drum(x9) & of(x9,x10) & n_bongo(x10) & (x7 = x8) & n_boy(x7) & subset_of(x6,x3) & n_foot(x6) & of(x6,x5) & n_person(x5) & -(x5 = x4) & n_hand(x2) & of(x2,x1) & n_girl(x1))
exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(n_table(x7) & of(x7,x8) & n_picnic(x8) & n_brother(x5) & of(x5,x2) & n_male(x2) & n_drum(x2) & of(x2,x3) & n_bongo(x3) & with(e1,x4) & at(x4,x7) & subset_of(x6,x4) & n_sister(x6) & subset_of(x5,x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))