query: Who was the one that computed the math to get the lander to the moon?
passage: Katherine Johnson
Katherine Coleman Goble Johnson (born August 26, 1918) is an African-American mathematician whose calculations of orbital mechanics as a NASA employee were critical to the success of the first and subsequent U.S. manned spaceflights.[2] During her 35-year career at NASA and its predecessor, she earned a reputation for mastering complex manual calculations and helped the space agency pioneer the use of computers to perform the tasks.
passage: Louis Lazarus Silverman
Louis Lazarus Silverman (21 April 1884 – 1967) was an American mathematician, the first person to receive a Ph.D. in mathematics from an academic institution in the state of Missouri.