Task: Explanation
Input (English): Roberto Vittori (born 15 October 1964 in Viterbo) is an Italian air force officer and an ESA astronaut. After graduating from the Italian Accademia Aeronautica in 1989, Vittori flew in the Italian Air Force. He then trained as a test pilot in the United States. Question: Which was an air force officer and an ESA astronaut, Claude Nicollier or Roberto Vittori? Answer: Roberto Vittori
Output (English): Roberto Vittori born 15 October 1964 in Viterbo is an Italian air force officer and an ESA astronaut.