Input: Article: In 494 BC, the city was at war with two neighboring tribes. The plebeian soldiers refused to march against the enemy, and instead seceded to the Aventine Hill. The plebeians demanded the right to elect their own officials. The patricians agreed, and the plebeians returned to the battlefield. The plebeians called these new officials "plebeian tribunes". The tribunes would have two assistants, called "plebeian aediles". During the 5th century BC, a series of reforms were passed. The result of these reforms was that any law passed by the plebeian would have the full force of law. In 443 BC, the censorship was created. From 375 BC to 371 BC, the republic experienced a constitutional crisis during which the tribunes used their vetoes to prevent the election of senior magistrates.

Now answer this question: During what century were reformed passed that allowed laws passed by the plebeians to have the full force of the law?

Output: 5th century BC

Input: Article: In 1952, Thomas Watson, Sr., stepped down after almost 40 years at the company helm; his son, Thomas Watson, Jr., was named president. In 1956, the company demonstrated the first practical example of artificial intelligence when Arthur L. Samuel of IBM's Poughkeepsie, New York, laboratory programmed an IBM 704 not merely to play checkers but "learn" from its own experience. In 1957, the FORTRAN (FORmula TRANslation) scientific programming language was developed. In 1961, Thomas J. Watson, Jr., was elected chairman of the board and Albert L. Williams became company president. The same year IBM developed the SABRE (Semi-Automatic Business-Related Environment) reservation system for American Airlines and introduced the highly successful Selectric typewriter.

Now answer this question: In 1956 the company demonstrated the first example of what?

Output: artificial intelligence

Input: Article: Von Neumann made fundamental contributions to mathematical statistics. In 1941, he derived the exact distribution of the ratio of the mean square of successive differences to the sample variance for independent and identically normally distributed variables. This ratio was applied to the residuals from regression models and is commonly known as the DurbinWatson statistic for testing the null hypothesis that the errors are serially independent against the alternative that they follow a stationary first order autoregression.

Now answer this question: How has mean square ratio been applied?

Output:
DurbinWatson statistic