Instructions: This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
Input: Passage: Selected by NASA in January 1990, Halsell became an astronaut in July 1991. A five flight veteran, Halsell has logged over 1,250 hours in space. He was the pilot on STS-65 (July 8-23, 1994) and STS-74 (November 12-20, 1995), and commanded STS-83 (Apr 4-8, 1997), STS-94 (July 1-17, 1997) and STS-101 (May 19-29, 2000). From February-August 1998, he served as NASA Director of Operations at the Yuri Gagarin Cosmonaut Training Center, Star City, Russia. Halsell also served as Manager, Shuttle Launch Integration, Kennedy Space Center, Florida, from July 2000-January 2003. Halsell was Space Shuttle Program manager for launch integration at the Kennedy Space Center from 2000-2002, responsible for giving the "go for launch" on 13 Shuttle missions. After the Columbia accident, he led the NASA Return to Flight Planning Team, responsible for converting the recommendations of the accident investigation board into Shuttle Program actions that resulted in resumption of missions in 2005. Following the Columbia accident, Halsell led NASA's Space Shuttle Return-to-Flight Planning Team. He then served as the Assistant Director for Aircraft Operations, Flight Crew Operations Directorate. Halsell retired from NASA in November 2006 to accept a position with ATK Launch Systems where he served as Vice President, Space Exploration Systems, and was the ATK site manager at Marshall Space Flight Center, Huntsville, AL.
Output:
How many months after being selected by NASA did Halsell become an astronaut?