Complex sentence: In 1890, when Enrique, Luis, and Carolina, children of a French entrepreneur born in Lorraine, founded Hijos de Casimiro Mahou in Madrid, the French surname was poised to become the flagship name of one of Spain's most famous beers.
Split into simpler sentences: In 1890, Enrique, Luis, and Carolina, the children of a French entrepreneur born in Lorraine, founded Hijos de Casimiro Mahou in Madrid. The French surname was to become the flagship name of one of Spain's most famous beers.