SIOUX FALLS, S.D. (AP) — The lives of five brothers and sisters born in North Dakota who were separately adopted at infancy took the twists and turns that 50 years bring. Some moved to different states; some married; some had children. But none of them ever knew the others existed.

Then, the obituary of their biological mother presented a clue. And when they finally met, one brother realized he wasn’t so unfamiliar with one of his siblings. John Maixner had been greeted a half a dozen times or so by his sister at their local Walmart in Dickinson, N.D., where she has worked for 23 years.