Task: Question Generation
Input (English): Passage: The newest bridge across the Parrett is Cocklemoor Bridge, a pedestrian footbridge close to the Great Bow Bridge. It was erected in 2006 and forms part of the River Parrett Trail. The next bridge upstream is Bicknell's bridge, which was formerly known as Bickling bridge, which carries the road from Huish Episcopi to Muchelney. It replaced a footbridge in 1829 or 1830. At Muchelney the Westover Bridge carries a minor road over the river, and another minor road crosses on the Thorney Bridge close to the Thorney (or silent) Mill and a lock. The mill, with an iron overshot wheel, was built to grind corn in 1823. Another bridge and mill occur further upstream at Gawbridge west of Martock, where the mill has been the subject of a feasibility study by the South Somerset Hydropower Group. Carey's Mill Bridge was built of Ham stone in the 18th century and named after Carey's Mill, which originally occupied the site. It is surrounded by a collection of buildings known as the Parrett Iron Works, founded in 1855 on the site of a former snuff mill, which included a foundry, with a prominent chimney, ropewalk, workshops and several smaller workshops and cottages. The sluice which powered the waterwheel and sluice keeper's cottage still exist. Further south the river flows under the A303 near Norton-sub-Hamdon and the A356 near Chedington.
Output (English): What is the name of the place that had a sluice and keeper's cottage that still exist?