Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Genealogists have made an error in compiling the family tree of Hillary Clinton and she is in fact linked to a poor Welsh mining family, an expert claimed As she kicks off her bid to enter the White House, Hillary Clinton could claim that her path to the presidency began some 160 years ago in the little-known Welsh parish of Ystradyfodwg – if she can pronounce it, that is. For while the US Democrat has previously spoken of her British ancestry, a definitive family tree has revealed her links to a poor mining community in the Welsh Valleys. Ystradyfodwg, pronounced Ust-rady-vod-ug, was the home of Mrs Clinton's great grandmother - a woman who showed a determination, similar to that of the former First Lady, to struggle through poverty and eventually emigrate to America with her family.A definitive family tree of Hillary Clinton reveals her Welsh ancestorsThey lived in a poor mining district called Ystradyfodwg, now RhonddaFamily emigrated to Pennsylvania where Mrs Clinton's grandmother Hannah Jones was born - one of four children out of 14 born to surviveHannah Jones then eloped with Hugh Rodham - Mrs Clinton's grandfather - to marry because his family probably disproved of her poor background 
 Question:1947 - _, the eldest of the couple's three children was born.

Hillary Clinton