With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leslie Groves directed a project that developed the atomic bomb.
text_B: Things That Fall from the Sky is a collection of eleven short stories by American author Kevin Brockmeier .. Kevin Brockmeier. Kevin Brockmeier. short stories. short stories. `` These Hands '' was selected for Prize Stories 2000  : The O. Henry Awards , `` The Ceiling '' appeared in The O. Henry Prize Stories 2002 -LRB- First Prize -RRB- , and `` Space '' appeared in The Best American Short Stories 2003 .. O. Henry Awards. O. Henry Awards. O. Henry Prize. O. Henry Prize. Best American Short Stories. Best American Short Stories
not_related.