This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.

Passage: Following the Protestant Reformation, promoted by local reformer Martin Bucer, the principle of cuius regio, eius religio led to a certain amount of religious diversity in the highlands of northern Alsace. Landowners, who as "local lords" had the right to decide which religion was allowed on their land, were eager to entice populations from the more attractive lowlands to settle and develop their property. Many accepted without discrimination Catholics, Lutherans, Calvinists, Jews and Anabaptists. Multiconfessional villages appeared, particularly in the region of Alsace bossue. Alsace became one of the French regions boasting a thriving Jewish community, and the only region with a noticeable Anabaptist population. The schism of the Amish under the lead of Jacob Amman from the Mennonites occurred in 1693 in Sainte-Marie-aux-Mines. The strongly Catholic Louis XIV tried in vain to drive them from Alsace. When Napoleon imposed military conscription without religious exception, most emigrated to the American continent.
When did the Anabaptists split?