I am verifying the answers generated by an automatic system to the following question: how many social classes existed in the han dynasty
Suggested answer: Science and technology during the Han period saw significant advances, including papermaking , the nautical steering rudder , the use of negative numbers in mathematics , the raised-relief map , the hydraulic -powered armillary sphere for astronomy , and a seismometer employing an inverted pendulum .
Should I validate this answer?
