Task: Question Understanding
Input (English): Passage: The western theater of the war has also been referred to as "Grey Lock's War". On August 13, 1723, Gray Lock entered the war by raiding Northfield, Massachusetts, when four warriors killed two citizens near Northfield. The next day, they attacked Joseph Stevens and his four sons in Rutland, Massachusetts. Stevens escaped, two of the boys were killed, and the other two sons were captured.:117  On October 9, 1723, Gray Lock struck two small forts near Northfield, inflicting casualties and carrying off one captive.:119 In response, Governor Dummer ordered the construction of Fort Dummer in Brattleboro, Vermont. The fort became a major base of operations for scouting and punitive expeditions into Abenaki country.:119 Fort Dummer was Vermont's first permanent settlement, made under the command of Lieutenant Timothy Dwight. On June 18, 1724, Grey Lock attacked a group of men working in a meadow near Hatfield, Massachusetts. He then moved on and killed men at Deerfield, Northfield, and Westfield over the summer. In response to the raids, Dummer ordered more soldiers for Northfield, Brookfield, Deerfield, and Sunderland, Massachusetts.:121 On October 11, 1724, 70 Abenakis attacked Fort Dummer and killed three or four soldiers. In September 1725, a scouting party of six men was sent out from Fort Dummer. Grey Lock and 14 others ambushed them just west of the Connecticut River, killing two and wounding and capturing three others. One man escaped, while two Indians were killed.:126
Question: When did the four warriors attack four sons?
Output (English): date