With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Maisie Williams portrays Sansa Stark.
text_B: Piptatherum is a genus of plants in the grass family known as ricegrass .. grass family. Poaceae. They are widely distributed across much of Eurasia , North Africa , and North America .. Eurasia. Eurasia. North Africa. North Africa. North America. North America. These are clumping perennial grasses with long , tapering leaf blades .. Species. formerly included. see Achnatherum Arundinella Eriochloa Nassella Oryzopsis Piptatheropsis Piptochaetium Stipa. Achnatherum. Achnatherum. Arundinella. Arundinella. Eriochloa. Eriochloa. Nassella. Nassella. Oryzopsis. Oryzopsis. Piptatheropsis. Piptatheropsis. Piptochaetium. Piptochaetium. Stipa. Stipa
not_related.