Question: The 2001 Humber Refinery explosion occurred in the parish that has a population of what, as of 2011?

full_context: Document 1: South Somercotes: South Somercotes is a village and civil parish 8 mi north-east from Louth and approximately 2 mi south from North Somercotes, Lincolnshire, England. The civil parish includes the hamlet of Scupholme.
Document 2: 2008 Georgia sugar refinery explosion: 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.
Document 3: 2001 Humber Refinery explosion: 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.
Document 4: Stallingborough: Stallingborough is a village and civil parish in North East Lincolnshire, England. The population of the civil parish at the 2011 census was 1,234.
Document 5: North Lincolnshire: North Lincolnshire is a unitary authority area in the region of Yorkshire and the Humber in England. The population of the Unitary Authority at the 2011 census was 167,446. For ceremonial purposes it is part of Lincolnshire. There are three significant towns: Scunthorpe (the administrative centre), Brigg and Barton-upon-Humber.
Document 6: 2009 Cataño oil refinery fire: 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.
Document 7: 2000 Phillips explosion: At approximately 1:22 p.m. CT on March 27, 2000, an explosion and fire responsible for 1 death and 71 injuries occurred at Phillips Petroleum's Houston Chemical Complex at 1400 Jefferson Road, Pasadena, Texas 77506. The fire produced huge plumes of black smoke that spread over the heavily industrialized Houston Ship Channel and neighboring residential areas.
Document 8: RAF North Killingholme: Royal Air Force North Killingholme or more simply RAF North Killingholme is a former Royal Air Force station located immediately west of the village of North Killingholme in North Lincolnshire.
Document 9: Killingholme B power station: Killingholme B Power Station is a Combined‐cycle gas turbine natural gas power station in the civil parish of North Killingholme in North Lincolnshire, north of the Lindsey Oil Refinery, and adjacent to Killingholme A power station
Document 10: Killingholme A power station: Killingholme A Power Station is a Combined‐cycle gas turbine natural gas power station in the civil parish of North Killingholme in North Lincolnshire, north of the Lindsey Oil Refinery, and adjacent to Killingholme B power station
Document 11: South Ferriby: South Ferriby is a village in North Lincolnshire, England. It is situated on the south bank of the Humber Estuary and 3 mi west from the Humber Bridge. North Ferriby is directly opposite on the Estuary’s north bank. Village population was 651 in 2011.
Document 12: Texas City Refinery explosion: 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.
Document 13: Shell Anacortes Refinery: Shell Oil Products US, a subsidiary of Royal Dutch Shell PLC, operates the Puget Sound Refinery located on March Point outside of Anacortes, WA. The plant is the largest taxpayer in Skagit County and one of the county's largest employers. The refinery has a 145,000 b/d capacity, making it the 52nd largest in the USA, in 2015, with facilities that include a delayed coker, fluid catalytic cracker, polymerization unit and alkylation units. Based on the secondary processing units in place, the facility likely follows a 3-2-1 crack spread. Shell’s refinery produces three grades of gasoline, fuel oil, diesel fuel, propane and butane. This plant is currently the only refinery in Washington state unable to accommodate tight oil via rail. The permitting process is currently underway for the proposed 60,000 b/d unloading capacity of the East Gate Rail Project.
Document 14: Deepwater Horizon explosion: The "Deepwater Horizon" drilling rig explosion was the April 20, 2010, explosion and subsequent fire on the "Deepwater Horizon" semi-submersible Mobile Offshore Drilling Unit (MODU), which was owned and operated by Transocean and drilling for BP in the Macondo Prospect oil field about 40 mi southeast off the Louisiana coast. The explosion and subsequent fire resulted in the sinking of the "Deepwater Horizon" and the deaths of 11 workers; 17 others were injured. The same blowout that caused the explosion also caused a massive offshore oil spill in the Gulf of Mexico, considered the largest accidental marine oil spill in the world, and the largest environmental disaster in U.S. history.
Document 15: South Killingholme: 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.
ground_truth: 1,108