With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: At Middleton is a 2013 TV show.
text_B: Arithmetic for Parents -LRB- Sumizdat , 2007 , -RRB- is a book about mathematics education aimed at parents and teachers .. mathematics education. mathematics education. The author , Ron Aharoni , is a professor of mathematics at the Technion ; he wrote the book based on his experiences teaching elementary mathematics to Israeli schoolchildren .. Ron Aharoni. Ron Aharoni. Technion. Technion – Israel Institute of Technology. elementary mathematics. elementary mathematics. The book was originally written in Hebrew and was translated to English , Portuguese and Dutch .
not_related.