Question: The 2001 Humber Refinery explosion occurred in the parish that has a population of what, as of 2011?
Context: Crigglestone is a village and civil parish in the City of Wakefield in West Yorkshire, England.  It is recorded as "Crigeston" (along with neighbouring "Orberie") in the Domesday Book.  The civil parish had a population of 9,271 at the 2011 Census.  On 29 July 1941, an explosion occurred at the Crigglestone Colliery, killing 21 men.  The site of the colliery is now an industrial estate. Worlaby is a village and civil parish in North Lincolnshire, England, 6 mi south-west from Barton-Upon-Humber and 5 mi north-east from Brigg.  The population of the civil parish at the 2011 census was 547.  It lies on the B1204, and to the east of the River Ancholme.  It is one of the five "Low Villages" – South Ferriby, Horkstow, Saxby All Saints, Bonby, and Worlaby – between Brigg and the River Humber, named so because of their position below the northern edge of the Lincolnshire Wolds.  Worlaby was previously part of South Humberside administrative district, and before that, the North Lindsey division of Lindsey, Lincolnshire. The 2008 Georgia sugar refinery explosion was an industrial disaster that occurred on February 7, 2008 in Port Wentworth, Georgia, United States.  13 people were killed and 40 injured when a dust explosion occurred at a sugar refinery owned by Imperial Sugar.  Dust explosions had been an issue of concern among United States authorities since three fatal accidents in 2003, with efforts made to improve safety and reduce the risk of recurrence. The 2001 Humber Refinery explosion was a major incident at the then Conoco-owned Humber Refinery at South Killingholme in North Lincolnshire, England.  A large explosion occurred on the Saturate Gas Plant area of the site on Easter Monday, 16 April 2001 at approximately 2:20 p.m.  There were no fatalities, but two people were injured. The 2011 Chengdu Foxconn explosion occurred on May 13, 2011 in Chengdu, Sichuan province, People’s Republic of China. Broomfleet is a village and civil parish in the East Riding of Yorkshire, England.  It is situated on the Humber estuary approximately 4 mi west of Brough.  According to the 2011 UK Census, Broomfleet parish had a population of 302, an increase on the 2001 UK Census figure of 293. The 2009 Cataño oil refinery fire was a fire that began with an explosion on October 23, 2009, and was extinguished on October 25 at the Caribbean Petroleum Corporation oil refinery and oil depot in Bayamón, Puerto Rico.  While the fire and subsequent explosion occurred close to the city of Cataño, it technically occurred within the borders of Bayamón, even though Cataño was more affected by fumes and evacuation.  There were no fatalities, but 3 people were injured. The Texas City Refinery explosion occurred on March 23, 2005, when a hydrocarbon vapor cloud was ignited and violently exploded at the ISOM isomerization process unit at BP's Texas City refinery in Texas City, Texas, killing 15 workers, injuring more than 180 others and severely damaging the refinery.  The Texas City Refinery was the second-largest oil refinery in the state, and the third-largest in the United States with an input capacity of 437000 oilbbl per day as of January 1, 2000.  BP acquired the Texas county refinery as part of its merger with Amoco in 1999. South Killingholme is a village and civil parish in North Lincolnshire, England.  The population of the civil parish at the 2011 census was 1,108. Barton-upon-Humber or Barton is a town and civil parish in North Lincolnshire, England.  The population at the 2011 census was 11,066.  It is situated on the south bank of the Humber Estuary at the southern end of the Humber Bridge.  It is 46 mi east of Leeds, 6 mi south-west of Hull and 31 mi north north-east of the county town of Lincoln.  Other nearby towns include Scunthorpe to the south-west and Grimsby to the south-east.
Answer: 1,108