target database changed to qald biomedical QA.
message output changed.
new method, get_parse_rendering, added.
get_parse_rendering method is called.
Add test data to loadSolutionStub to validate the rendering three nodes.
Make an emission of all event  synchronous.
Because the next anchored_pgp may be emitted faster than all solutions of the previous anchored_pgp.
Arrange the initial position of the anchored_pgp.nodes when three nodes.