With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Winona Ryder has worked her entire life as an opera singer.
text_B: MTD -LRB- f -RRB- , is a minimax search algorithm , developed in 1994 by Aske Plaat , Jonathan Schaeffer , Wim Pijls , and Arie de Bruin .. minimax. minimax. Aske Plaat. Aske Plaat. Jonathan Schaeffer. Jonathan Schaeffer. Wim Pijls. Wim Pijls. Arie de Bruin. Arie de Bruin. Experiments with tournament-quality chess , checkers , and Othello programs show it to be the most efficient minimax algorithm .. minimax. minimax. The name MTD -LRB- f -RRB- is an abbreviation for MTD -LRB- n , f -RRB- -LRB- Memory-enhanced Test Driver with node n and value f -RRB- .. It is an alternative to the alpha-beta pruning algorithm .. alpha-beta pruning. alpha-beta pruning
not_related.