With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Judi Dench has been nominated for a Tony seven times.
text_B: Leonard Pershing Guarente -LRB- born 1952 -RRB- is an American biologist best known for his research on life span extension in the budding yeast Saccharomyces cerevisiae , round worms -LRB- Caenorhabditis elegans -RRB- , and mice .. biologist. biologist. Saccharomyces cerevisiae. Saccharomyces cerevisiae. Caenorhabditis elegans. Caenorhabditis elegans. He is currently a Novartis Professor of Biology at the Massachusetts Institute of Technology .. Massachusetts Institute of Technology. Massachusetts Institute of Technology. Based on the discovery that SIR2 is a key regulator of longevity in both yeast and worms , he is interested in determining whether this highly conserved gene also governs longevity in other organisms , including mammals .. SIR2. SIR2
not_related.