With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sarah Silverman starred in The Dark Knight Returns.
text_B: Magnesium citrate is a magnesium preparation in salt form with citric acid in a 1 :1 ratio -LRB- 1 magnesium atom per citrate molecule -RRB- .. magnesium preparation. Magnesium ( pharmaceutical preparation ). salt. Salt ( chemistry ). citric acid. citric acid. magnesium. magnesium. atom. atom. citrate. citrate. molecule. molecule. The name `` magnesium citrate '' is ambiguous and sometimes may refer to other salts such as trimagnesium citrate which has a magnesium  : citrate ratio of 3 :2 .. magnesium. magnesium. citrate. citrate. trimagnesium citrate. trimagnesium citrate. Magnesium citrate is used medicinally as a saline laxative and to completely empty the bowel prior to a major surgery or colonoscopy .. citrate. citrate. laxative. laxative. colonoscopy. colonoscopy. It is available without a prescription , both as a generic and under various brand names including Citromag and Citroma .. It is also used in the pill form as a magnesium dietary supplement .. magnesium. magnesium. dietary supplement. dietary supplement. It contains 11.23 % magnesium by weight .. magnesium. magnesium. Compared to trimagnesium citrate , it is much more water-soluble , less alkaline , and contains less magnesium .. magnesium. magnesium. citrate. citrate. trimagnesium citrate. trimagnesium citrate. As a food additive , magnesium citrate is used to regulate acidity and is known as E number E345 .. magnesium. magnesium. citrate. citrate. food additive. food additive. E number. E number
not_related.