With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dr. Dre had an estimated pre-tax income of $620 million in 2014.
text_B: Pre-kindergarten -LRB- also called Pre-K or PK -RRB- is a classroom-based preschool program for children at or below the age of five in the United States , Canada and Turkey -LRB- when kindergarten starts -RRB- .. classroom. classroom. preschool. preschool. kindergarten. kindergarten. It may be delivered through a preschool or within a reception year in elementary school .. preschool. preschool. elementary school. elementary school ( United States ). Pre-kindergartens play an important role in early childhood education .. early childhood education. early childhood education. They have existed in the US since 1922 , normally run by private organizations .. The U.S. Head Start program , the country 's first federally funded pre-kindergarten program , was founded in 1967 .. kindergarten. kindergarten. Head Start. Head Start ( program ). This attempts to prepare children -LRB- especially disadvantaged children -RRB- to succeed in school .
not_related.