With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Grand Theft Auto V is a Canadian game.
text_B: Greigite is an iron sulfide mineral with formula Fe3S4 -LRB- Iron -LRB- II , III -RRB- sulfide -RRB- .. iron. iron. sulfide. sulfide. It is the sulfur equivalent of the iron oxide magnetite -LRB- Fe3O4 -RRB- .. iron. iron. magnetite. magnetite. It was first described in 1964 for an occurrence in San Bernardino County , California , and named after the mineralogist and physical chemist Joseph W. Greig -LRB- 1895 -- 1977 -RRB- .. Joseph W. Greig. Joseph W. Greig
not_related.