With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Grant Gustin performed in a Fox television series.
text_B: Thomas Grant Gustin -LRB- born January 14 , 1990 -RRB- is an American actor , singer , and dancer .. He is known for his role as Barry Allen  /  the Flash -LRB- based on the DC Comics character of the same name -RRB- on the CW series The Flash and Arrow , both in the Arrowverse television franchise , and his role as Sebastian Smythe on the Fox series Glee .. The Flash. The Flash ( 2014 TV series ). Glee. Glee ( TV series ). Barry Allen  /  the Flash. Flash ( Barry Allen ). DC Comics. DC Comics. The CW. Arrow. Arrow ( TV series ). Arrowverse. Arrowverse. Sebastian Smythe. Characters of Glee#Sebastian Smythe. Fox. Fox Broadcasting Company
related.