With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mr. Sunshine aired in the 21st century.
text_B: Mr. Sunshine is an American television sitcom that aired from February 9 to April 6 , 2011 , as a mid-season replacement .. mid-season replacement. mid-season replacement. The single-camera comedy was co-created by Matthew Perry , who also starred in the series .. Matthew Perry. Matthew Perry. single-camera. Single-camera setup. ABC cancelled the series on May 13 , 2011 due to low ratings .. ABC. American Broadcasting Company
related.