Input: Article: Von Neumann's principal contribution to the atomic bomb was in the concept and design of the explosive lenses needed to compress the plutonium core of the Fat Man weapon that was later dropped on Nagasaki. While von Neumann did not originate the "implosion" concept, he was one of its most persistent proponents, encouraging its continued development against the instincts of many of his colleagues, who felt such a design to be unworkable. He also eventually came up with the idea of using more powerful shaped charges and less fissionable material to greatly increase the speed of "assembly".

Now answer this question: What principal contribution did von Neumann make to atomic bomb?

Output: concept and design of the explosive lenses needed to compress the plutonium core

Input: Article: West of Fort Washington Avenue, 181st Street is largely residential, bordering Hudson Heights and having a few shops to serve the local residents. East of Fort Washington Avenue, the street becomes increasingly commercial, becoming dominated entirely by retail stores where the street reaches Broadway and continues as such until reaching the Harlem River. It is the area's major shopping district.

Now answer this question: Which river touches the major shopping district near 181st Street?

Output: Harlem

Input: Article: In June, 1998 Sammy Sosa exploded into the pursuit of Roger Maris' home run record. Sosa had 13 home runs entering the month, representing less than half of Mark McGwire's total. Sosa had his first of four multi-home run games that month on June 1, and went on to break Rudy York's record with 20 home runs in the month, a record that still stands. By the end of his historic month, the outfielder's 33 home runs tied him with Ken Griffey, Jr. and left him only four behind McGwire's 37. Sosa finished with 66 and won the NL MVP Award.

Now answer this question: When did Sammy Sosa explode into pursuit of Roger Maris' home run record?

Output:
1998