With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kangana Ranaut's career is in Bollywood.
text_B: Abell 7 is a faint planetary nebula located 1800 light-years away in the constellation of Lepus .. Lepus. Lepus. planetary nebula. planetary nebula. constellation. constellation. It has a generally spherical shape about 8 light-years in diameter .. Within the sphere are complex details that are brought out by narrowband filters .. Abell 7 is estimated to be only 20,000 years old , but the central star , a fading white dwarf , is estimated to be some 10 billion years old .. white dwarf. white dwarf
not_related.