Question: Which magazine, Airliners or Y'all, had its editorial headquarters in Castro Valley, California?

Context paragraphs:
Storyworks: Storyworks is a literary magazine published in the United States by Scholastic Inc., for students in grades 3-6 and their teachers.  The magazine was founded in 1993 by Scholastic editor Tamara Hanneman.  It is published six times during the academic year.  Each issue features fiction, nonfiction, poetry and a play.  The magazine also publishes numerous writing prompts, word games, contests, and short articles related to reading and writing.  An accompanying Teacher's Edition provides ideas and guidelines for using the magazine in the classroom.  It is now edited by Lauren Tarshis, who is also the author of many children's books including the "New York Times" bestselling "I Survived" series.  The "Storyworks" editorial headquarters are in New York City and its distribution center is in Jefferson City, Missouri.

Alameda County Library: The Alameda County Library, in Alameda County, California, is a public library system that provides services from ten branch libraries in the cities of Albany, Dublin, Fremont, Newark and Union City and the unincorporated communities of Castro Valley and San Lorenzo.  According to 2005/2006 statistics, the total service area represents a population of about 522,000, and annual circulation is reported to be around 5.5 million.  Its headquarters are located in Fremont.

Castro Valley High School: Castro Valley High School is located in the unincorporated suburban community of Castro Valley, California, United States.  It is a comprehensive public high school for grades 9 to 12.  Named a National Exemplary School in 1984–85 and 1988–89, it was a California Distinguished School in 1987–88, 2000-01, and 2009.

Y'all (magazine): Y'all magazine is an American magazine based out of Oxford, Mississippi, literary hub of the American South.  It was published bimonthly with a circulation of 100,000 and features Southern celebrities, events and ordinary people with extraordinary stories to tell.  According to the magazine's mySpace page, "Y'all covers the South's 15 states and its 103 million people, just like kudzu."

Castro Valley Unified School District: The Castro Valley Unified School District (CVUSD) is located in Castro Valley, California, United States.  It is a public preschool through adult school district.  Overall, the district contains almost 9,000 students.  It was created in 1965.

Airliners (magazine): Airliners was an American magazine dedicated to the airline industry.  Six issues were circulated each year.  The title was first published by World Transport Press in 1988.  Since the 100th issue (July/August 2006) it was produced by Airliners Publications, LLC.  For a time, the editorial headquarters of the magazine was in Castro Valley, California, although it later was based in Miami.

Castro Valley station: Castro Valley is a Bay Area Rapid Transit station serving Castro Valley, California.

Hayward Area Recreation and Park District: The Hayward Area Recreation and Park District (H.A.R.D.) is the park management agency for most of the parks in the city of Hayward, California and environs.  It was created in 1944 and is an independent special district under California law.  H.A.R.D. is the largest recreation district in California.  It manages parks in the bordering city of San Leandro, and the unincorporated regions of Castro Valley and San Lorenzo.  It manages the park grounds for numerous schools in the region.  Events and classes are scheduled and listed in a quarterly brochure.  The parks 2010-2011 budget was $24,383,637.

Redwood Alternative High School: Redwood High School is an alternative/continuation public high school in Castro Valley, California, United States.  It is the only alternative/continuation high school in Castro Valley, and is one of only two high schools in Castro Valley, the other being Castro Valley High School.  Redwood High School was remodeled from 2006 to 2008.

Rancho San Lorenzo: Rancho San Lorenzo was a 26722 acre Mexican land grant given in 1841 by Governor Juan Alvarado to Guillermo Castro a career soldier posted to the Pueblo of San José.  The land grant included present day Hayward, San Lorenzo, and Castro Valley, including Crow Canyon, Cull Canyon, and Palomares Canyons.

Supporting paragraphs: Airliners (magazine) Y'all (magazine)
Answer: Airliners