With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Katy Perry is the name Katy Hudson uses on stage.
text_B: The Wall -LRB- Le Mur -RRB- by Jean-Paul Sartre , a collection of short stories published in 1939 containing the eponymous story `` The Wall , '' is considered one of the author 's greatest existentialist works of fiction .. Jean-Paul Sartre. Jean-Paul Sartre. existentialist. existentialist. Sartre dedicated the book to his companion Olga Kosakiewicz , a former student of Simone de Beauvoir .. Olga Kosakiewicz. Olga Kosakiewicz. Simone de Beauvoir. Simone de Beauvoir
not_related.