Complex sentence: In 1933 the so-called Vorstengraf was uncovered during the construction of a trailer park on the heath, it contained a bronze bucket containing a (curved) iron sword from 700 BC. The find was transferred to the Rijksmuseum van Oudheden in Leiden.
Split into simpler sentences: In 1933 the so-called Vorstengraf was uncovered during the construction of a trailer park on the heath. It contained a bronze bucket containing a curved iron sword from 700 BC. The find was transferred to the Rijksmuseum van Oudheden in Leiden.