With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Novak Djokovic lost 31 ATP World Tour Masters 1000 series matches in a row.
text_B: NGC 1291 -LRB- Spirit Alu -RRB- , also known as NGC 1269 , is a ring galaxy with an unusual inner bar and outer ring structure located about 33 million light-years away in the constellation Eridanus .. NGC. New General Catalogue. 1 E22 m. Eridanus. Eridanus ( constellation ). ring galaxy. ring galaxy. constellation. constellation. In the Catalogue of Named Galaxies , it is called Chrysopis Eridani , or the golden-eye galaxy .. It was discovered by James Dunlop in 1826 and subsequently entered into the New General Catalogue as NGC 1291 by Johan Ludvig Emil Dreyer .. NGC. New General Catalogue. James Dunlop. James Dunlop. New General Catalogue. New General Catalogue. Johan Ludvig Emil Dreyer. Johan Ludvig Emil Dreyer. John Herschel then observed the same object in 1836 and entered it into the catalog as NGC 1269 without realizing that it was a duplicate .. NGC. New General Catalogue. John Herschel. John Herschel. This galaxy was cited as an example of a `` transitional galaxy '' by NASA 's Galaxy Evolution Explorer team in 2007 .. NASA. NASA. Galaxy Evolution Explorer. Galaxy Evolution Explorer. second
not_related.