A boy holds an instrument in a ramshackle classroom.
the boy was in music class
Holds an instrument in a classroom does not necessarily imply being in a music class.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_classroom(x3) & a_ramshackle(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_instrument(x2) & n_boy(x1))
exists p1 x1.(n_boy(x1) & exists x2 x3.(in(x1,x2) & n_class(x2) & of(x2,x3) & n_music(x3)))