With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Game of Thrones (season 1) didn't feature Michelle Fairley as Catelyn Stark.
text_B: The Skunk River is a 93 mitributary of the Mississippi River in the state of Iowa in the United States .. Mississippi River. Mississippi River. Iowa. Iowa. United States. United States
not_related.