Detailed Instructions: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
Problem:Question: What year was the plane introduced that Carpenter trained for at Whidbey Island? Passage:After three months at the Fleet Airborne Electronics Training School in San Diego, California, Carpenter went to a Lockheed P-2 Neptune transitional training unit at Whidbey Island, Washington, after which he was assigned to Patrol Squadron 6 (VP-6), based at Naval Air Station Barbers Point, Hawaii, in November 1951. On his first deployment, Carpenter flew on reconnaissance and anti-submarine warfare missions from Naval Air Station Atsugi in Japan during the Korean War. On his second deployment, forward-based at Naval Air Facility Adak, Alaska, he flew surveillance missions along the Russian and Chinese coasts. For his third and final deployment, he was based on Guam, flying missions off the coast of China. He was designated as patrol plane commander, the only one in VP-6 with the rank of lieutenant (junior grade)—all the rest held higher rank. 

Solution:
After three months at the Fleet Airborne Electronics Training School in San Diego, California, Carpenter went to a Lockheed P-2 Neptune transitional training unit at Whidbey Island, Washington, after which he was assigned to Patrol Squadron 6 (VP-6), based at Naval Air Station Barbers Point, Hawaii, in November 1951