With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Samuel Witwer plays music.
text_B: Arkell Cirque is a large cirque on the south face of the central Read Mountains , Shackleton Range .. cirque. cirque. Read Mountains. Read Mountains. Shackleton Range. Shackleton Range. It was photographed from the air by the U.S. Navy in 1967 and surveyed from the ground by the British Antarctic Survey , 1968 -- 71 .. U.S. Navy. U.S. Navy. British Antarctic Survey. British Antarctic Survey. It was named by the United Kingdom Antarctic Place-Names Committee after William Joscelyn Arkell , English geologist , a specialist in Jurassic stratigraphy and paleontology .. United Kingdom Antarctic Place-Names Committee. United Kingdom Antarctic Place-Names Committee. William Joscelyn Arkell. William Joscelyn Arkell. Jurassic. Jurassic. stratigraphy. stratigraphy. paleontology. paleontology
not_related.