Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Example: In 1582 the united provinces invited francis, duke of anjou to lead them; but after a failed attempt to take antwerp in 1583, the duke left the netherlands again. after the assassination of william of orange (10 july 1584), both henry iii of france and elizabeth i of england declined the offer of sovereignty. however, the latter agreed to turn the united provinces into a protectorate of england (treaty of nonsuch, 1585), and sent the earl of leicester as governor-general. this was unsuccessful and in 1588 the provinces became a confederacy. the union of utrecht is regarded as the foundation of the republic of the seven united provinces, which was not recognized by the spanish empire until the peace of westphalia in 1648.
Example solution: In what year did francis, duke of anjou leave the netherlands?
Example explanation: The generated question is perfect. Because the question is based on second sentence of the input passage and its answer is 1583.

Problem: Penobscot tribal chiefs expressed a willingness to enter peace talks with Lieutenant Governor Dummer in December 1724. They were opposed in this by French authorities, who continued to encourage the conflict, but Massachusetts Lieutenant Governor Dummer announced a cessation of hostilities on 31 July 1725 following negotiations in March.:83 The terms of this preliminary agreement were negotiated by Dummer and Chiefs Loron and Wenemouet and applied only to the Penobscots at first. They were allowed to retain Jesuit priests, but the two parties were in disagreement concerning land titles and British sovereignty over the Wabanakis. The written agreement was translated into Abenaki by French Jesuit Etienne Lauverjat; Chief Loron immediately repudiated it, specifically rejecting claims of British sovereignty over him. Despite his disagreement, Loron pursued peace, sending wampum belts to other tribal leaders, although his envoys were unsuccessful in reaching Gray Lock, who continued his raiding expeditions. Peace treaties were signed in Maine on 15 December 1725 and in Nova Scotia on 15 June 1726, involving a large number of tribal chiefs. The peace was reconfirmed by all except Gray Lock at a major gathering at Falmouth in the summer of 1727; other tribal envoys claimed that they were not able to locate him. Gray Lock's activity came to an end in 1727, after which time he disappears from English records.
Solution: At what event was Gray Lock discovered to be missing?