they were each adopted by two different families
peggy: did you hear that amazing story on the radio this morning about the two chinese baby girls?
dinah: no, i had to go out early, so i missed it.
peggy: well, they were each adopted by two different families from different parts of the country. the families came to know each other through the adoption society.
dinah: so what's amazing about that?
peggy: well, they discovered that they had each got their baby from exactly the same part of china, but at different times.