With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Flash had only two seasons.
text_B: The Flash is an American television series developed by Greg Berlanti , Andrew Kreisberg and Geoff Johns , airing on The CW .. Greg Berlanti. Greg Berlanti. Andrew Kreisberg. Andrew Kreisberg. Geoff Johns. Geoff Johns. The CW. The CW. It is based on the DC Comics character Barry Allen  /  Flash , a costumed superhero crime-fighter with the power to move at superhuman speeds .. DC Comics. DC Comics. Barry Allen  /  Flash. Flash ( Barry Allen ). It is a spin-off from Arrow , existing in the same fictional universe .. spin-off. Spin-off ( media ). Arrow. Arrow ( TV series ). fictional universe. Arrowverse. The series follows Allen , portrayed by Grant Gustin , a crime scene investigator who gains super-human speed , which he uses to fight criminals , including others who have also gained superhuman abilities .. Grant Gustin. Grant Gustin. Initially envisioned as a backdoor pilot , the positive reception Gustin received during two appearances as Barry on Arrow led to executives choosing to develop a full pilot to make use of a larger budget and help flesh out Barry 's world in more detail .. Arrow. Arrow ( TV series ). backdoor pilot. backdoor pilot. Colleen Atwood , costume designer for Arrow , was brought in to design the Flash 's suit .. Arrow. Arrow ( TV series ). Colleen Atwood. Colleen Atwood. The creative team wanted to make sure that the Flash would resemble his comic book counterpart , and not simply be a poor imitation .. The series is primarily filmed in Vancouver , British Columbia , Canada .. The Flash premiered in North America on October 7 , 2014 , where the pilot became the second-most watched premiere in the history of The CW , after The Vampire Diaries in 2009 .. The CW. The CW. The Vampire Diaries. The Vampire Diaries ( TV series ). It has been well received by critics and audiences , and won the People 's Choice Award for `` Favorite New TV Drama '' in 2014 .. Drama. Drama ( genre ). The series was renewed for a third season in March 2016 , which premiered on October 4 , 2016 .. The series , together with Arrow , has spun characters out to their own show , Legends of Tomorrow , which premiered on January 21 , 2016 .. Arrow. Arrow ( TV series ). Legends of Tomorrow. Legends of Tomorrow. On January 8 , 2017 , The CW renewed the show for a fourth season .. The CW. The CW
related.