With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Octopuses defend themselves against Catholics.
text_B: Messier 14 -LRB- also known as M14 or NGC 6402 -RRB- is a globular cluster in the constellation Ophiuchus .. Ophiuchus. Ophiuchus. globular cluster. globular cluster. constellation. constellation. It was discovered by Charles Messier in 1764 .. Charles Messier. Charles Messier. At a distance of about 30,000 light-years , M14 contains several hundred thousand stars .. At an apparent magnitude of +7.6 it can be easily observed with binoculars .. apparent magnitude. apparent magnitude. binoculars. binoculars. Medium-sized telescopes will show some hint of the individual stars of which the brightest is of magnitude +14 .. The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12 .. luminosity. luminosity. Sun. Sun. absolute magnitude. absolute magnitude. The shape of the cluster is decidedly elongated .. M14 is about 100 light-years across .. A total of 70 variable stars are known in M14 , many of the W Virginis variety common in globular clusters .. W Virginis. W Virginis variable. In 1938 , a nova appeared , although this was not discovered until photographic plates from that time were studied in 1964 .. nova. nova. photographic plates. photographic plates. It is estimated that the nova reached a maximum brightness of magnitude +9.2 , over five times brighter than the brightest ` normal ' star in the cluster .. star. star. nova. nova. Slightly over 3 ° southwest of M14 lies the faint globular cluster NGC 6366 .. globular cluster. globular cluster. NGC 6366. NGC 6366
not_related.