Two young girls are playing large string instruments and intently looking at their music sheets which are being held on music stands.
Two children are playing cellos.
Just because the girls are playing large string instruments does not mean they are cellos in particular.
exists e1 e3 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8.(a_intently(s4) & Manner(e2,s4) & at(e2,x5) & on(e3,x8) & n_stand(x8) & of(x8,x6) & n_music(x6) & n_music(x6) & Theme(e3,x7) & v_hold(e3) & (x5 = x7) & n_sheet(x5) & of(x5,x6) & of(x5,x1) & n_thing(x1) & Actor(e2,x4) & v_look(e2) & n_girl(x4) & a_young(s3) & Theme(s3,x4) & card_eq_2(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & of(x2,x3) & n_string(x3) & a_large(s2) & Theme(s2,x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_cello(x2) & n_child(x1) & card_eq_2(x1))