Children are reading and writing.
Children have reading and writing materials.
To be able to read and write, the children must have reading and writing materials.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_write(x2) & n_child(x1))
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & subset_of(e1,x2) & Theme(e1,x5) & Actor(e1,x4) & v_writing(e1) & n_material(x5) & n_thing(x4) & subset_of(x3,x2) & n_reading(x3) & n_child(x1))