Question: Which competitor to "Strange Stories" was edited by John W. Campbell?

Context paragraphs:
John W. Jones House: The John W. Jones House currently stands at 1250 Davis Street, Elmira, New York, across from a historic entrance to Woodlawn Cemetery.  It is the former home of John W. Jones and current home of the John W. Jones Museum.  It stands on part of its original property, though it originally faced College Avenue.  Historically, the house was the private residence of John W. Jones and his family, but changed ownership several times since, and was used as rental property that fell into disrepair.  Condemned by the City of Elmira in 1997, Lucy Brown brought it to the public’s attention and with a group of concerned citizens, saved it from demolition.  It is now the home to the John W. Jones Museum.

Strange Stories: Strange Stories was a pulp magazine which ran for thirteen issues from 1939 to 1941.  It was edited by Mort Weisinger, who was not credited.  Contributors included Robert Bloch, Eric Frank Russell, C. L. Moore, August Derleth, and Henry Kuttner.  "Strange Stories" was a competitor to the established leader in weird fiction, "Weird Tales".  With the launch, also in 1939, of the well-received "Unknown", "Strange Stories" was unable to compete.  It ceased publication in 1941 when Weisinger left to edit "Superman" comic books.

Carl Richard Jacobi: Carl Richard Jacobi (July 10, 1908 – August 25, 1997) was an American journalist and author.  He wrote short stories in the horror and fantasy genres for the pulp magazine market, appearing in such pulps of the bizarre and uncanny as Thrilling, "Ghost Stories", Startling Stories, Thrilling Wonder Stories, Planet Stories and Strange Stories.  He also write stories crime and adventure which appeared in such pulps as Thrilling Adventures, "Complete Stories", Top-Notch, Short Stories, The Skipper, Doc Savage, and "Dime Adventures Magazine".  He also produced some science fiction, mainly space opera, published in such magazines as Planet Stories.  He was one of the last surviving pulp-fictioneers to have contributed to the legendary American horror magazine "Weird Tales" during its "glory days" (the 1920s and 1930s).  His stories have been translated into French, Swedish, Danish and Dutch.

The Black Star Passes: The Black Star Passes is a collection of science fiction short stories by American author John W. Campbell, Jr..  It was first published in 1953 by Fantasy Press in an edition of 2,951 copies.  The book is the first in Campbell's Arcot, Morey and Wade series.  The stories originally appeared in the magazines "Amazing Stories" and "Amazing Stories Quarterly", and were "extensively edited" for book publication, with Campbell's approval, by Lloyd Arthur Eshbach.

Far Lands, Other Days: Far Lands, Other Days is a collection of fantasy, horror and mystery short stories by author E. Hoffmann Price.  It was released in 1975 by Carcosa in an edition of 2,593 copies of which 615 copies, that were pre-ordered, were signed by the author and artist.  The stories originally appeared in the magazines "Weird Tales", "Strange Detective Stories", "Spicy-Adventure Stories", "Golden Fleece", "Argosy", "Spicy Mystery Stories", "Strange Stories", "Short Stories", "Terror Tales" and "Speed Mystery".

A New Dawn: A New Dawn: The Don A. Stuart Stories of John W. Campbell, Jr. is an archival collection of science fiction stories by John W. Campbell, published in hardcover by NESFA Press in 2003.  The volume was compiled and edited by James A. Mann.  It includes all 16 stories published by Campbell under that pseudonym, as well as two Campbell/Stuart nonfiction pieces and an introduction by Barry Malzberg.  Gary K. Wolfe declared that "the collected Stuart stories constitute a key document in the intellectual history of SF".

Astounding: John W. Campbell Memorial Anthology: Astounding: John W. Campbell Memorial Anthology is a 1973 festschrift honoring noted science fiction and fantasy editor John W. Campbell, in the form of an anthology of short stories by various science fiction authors, edited by Harry Harrison.  It was first published in hardcover by Random House as a selection of the Science Fiction Book Club, and first published in paperback by Ballantine Books.

Analog Science Fiction and Fact: Analog Science Fiction and Fact is an American science-fiction magazine published under various titles since 1930.  Originally titled Astounding "Stories of Super-Science", the first issue was dated January 1930, published by William Clayton, and edited by Harry Bates.  Clayton went bankrupt in 1933 and the magazine was sold to Street & Smith.  The new editor was F. Orlin Tremaine, who soon made "Astounding" the leading magazine in the nascent pulp science fiction field, publishing well-regarded stories such as Jack Williamson's "Legion of Space" and John W. Campbell's "Twilight".  At the end of 1937, Campbell took over editorial duties under Tremaine's supervision, and the following year Tremaine was let go, giving Campbell more independence.  Over the next few years Campbell published many stories that became classics in the field, including Isaac Asimov's "Foundation" series, A.E. van Vogt's "Slan", and several novels and stories by Robert A. Heinlein.  The period beginning with Campbell's editorship is often referred to as the Golden Age of Science Fiction.

Unknown (magazine): Unknown (also known as Unknown Worlds) was an American pulp fantasy fiction magazine, published from 1939 to 1943 by Street & Smith, and edited by John W. Campbell.  "Unknown" was a companion to Street & Smith's science fiction pulp, "Astounding Science Fiction", which was also edited by Campbell at the time; many authors and illustrators contributed to both magazines.  The leading fantasy magazine in the 1930s was "Weird Tales", which focused on shock and horror.  Campbell wanted to publish a fantasy magazine with more finesse and humor than "Weird Tales", and put his plans into action when Eric Frank Russell sent him the manuscript of his novel "Sinister Barrier", about aliens who own the human race.  "Unknown"' s first issue appeared in March 1939; in addition to "Sinister Barrier", it included H. L. Gold's "Trouble With Water", a humorous fantasy about a New Yorker who meets a water gnome.  Gold's story was the first of many in "Unknown" to combine commonplace reality with the fantastic.

John W. Pope Jr. Convocation Center: The John W. Pope Jr.  Convocation Center is a multi-purpose arena in Buies Creek, North Carolina.  The arena, Gore Arena, is located on the campus of Campbell University and hosts the university's basketball, volleyball, and wrestling programs.  It is named for Gilbert Craig Gore, the late son of a Campbell alum.  The John W. Pope Jr.  Convocation Center is a part of the expansion plan of Campbell's athletic facilities, which includes a new football stadium and renovations to existing Taylor Field of the baseball program.  The John W. Pope Jr.  Convocation Center replaced Carter Gymnasium, which was the second smallest gymnasium in Division I Basketball with just 947 seats, second only to Charleston Southern's Fieldhouse which holds 750.  The John W. Pope Jr.  Convocation Center also host events such as the universities commencement ceremonies and other university related events.

Supporting paragraphs: Strange Stories Unknown (magazine)
Answer: "Unknown"