Several people perform in a band consisting of two guitars and drums.
A group of children performing using musical instruments.
The band could be made up of adults, and not be a group of children.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(in(e1,x2) & of(e2,x4) & subset_of(x6,x4) & n_drum(x6) & subset_of(x5,x4) & n_guitar(x5) & card_eq_2(x5) & Actor(e2,x3) & v_consist(e2) & (x2 = x3) & n_band(x2) & Actor(e1,x1) & v_perform(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e1 e2 s1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_use(e2) & n_instrument(x4) & a_musical(s1) & Theme(s1,x4) & Actor(e1,x3) & v_perform(e1) & (x2 = x3) & n_child(x2) & n_group(x1))