Complex sentence: The breed was created through crossing of local breeds from the Franche-Comté region with Fleckvieh cattle at the beginnung of the 18th century, explaining the likeness of the Montbeliard cattle and the Fleckvieh cattle.
Split into simpler sentences: The breed was created through crossing of local breeds from the Franche-Comté region with Fleckvieh cattle at the beginnung of the 18th century. So you can explain the likeness of the Montbeliard cattle and the Fleckvieh cattle.