With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: California Gurls was recorded by an American singer.
text_B: Thomas `` Tom '' Sawyer is the title character of the Mark Twain novel The Adventures of Tom Sawyer -LRB- 1876 -RRB- .. The Adventures of Tom Sawyer. The Adventures of Tom Sawyer. Mark Twain. Mark Twain. He appears in three other novels by Twain  : Adventures of Huckleberry Finn -LRB- 1884 -RRB- , Tom Sawyer Abroad -LRB- 1894 -RRB- , and Tom Sawyer , Detective -LRB- 1896 -RRB- .. Adventures of Huckleberry Finn. Adventures of Huckleberry Finn. Tom Sawyer Abroad. Tom Sawyer Abroad. Sawyer also appears in at least three unfinished Twain works , Huck and Tom Among the Indians , Schoolhouse Hill and Tom Sawyer 's Conspiracy .. Schoolhouse Hill. Schoolhouse Hill. While all three uncompleted works were posthumously published , only Tom Sawyer 's Conspiracy has a complete plot , as Twain abandoned the other two works after finishing only a few chapters .
not_related.