Table: head_of_river_queensland
Columns: crew
open_1st_viii
open_2nd_viii
open_3rd_viii
year_11_1st_viii
year_11_2nd_viii
year_11_3rd_viii
year_10_1st_quad
year_10_2nd_quad
year_10_3rd_quad
year_10_4th_quad
year_10_5th_quad
year_10_6th_quad

Question: What is the Year 10 6th Quads for the Open 2nd VIII of ACGS and a Year 11 2nd VIII NC?
SQL: SELECT "year_10_6th_quad" FROM head_of_river_queensland WHERE "open_2nd_viii" = 'acgs' AND "year_11_2nd_viii" = 'nc'

Question: What is the Year 10 5th Quads with NC as Open 1st VIII and NC as a Year 10 3rd Quads?
SQL: SELECT "year_10_5th_quad" FROM head_of_river_queensland WHERE "open_1st_viii" = 'nc' AND "year_10_3rd_quad" = 'nc'

Question: What is the Open 1st VIII for the 2012 crew?
SQL: SELECT "open_1st_viii" FROM head_of_river_queensland WHERE "crew" = 2012