Table: head_of_river_queensland_2
Columns: crew
open_1st_viii
open_2nd_viii
open_3rd_viii
u16_1st_viii
u16_2nd_viii
u16_3rd_viii
u15_1st_quad
u15_2nd_quad
u15_3rd_quad
u15_4th_quad
u15_5th_quad
u15_6th_quad

Question: Which Open 2nd VIII had a U15 6th Quad of BGS and a U16 1st VII of TSS?
SQL: SELECT "open_2nd_viii" FROM head_of_river_queensland_2 WHERE "u15_6th_quad" = 'bgs' AND "u16_1st_viii" = 'tss'

Question: What U15 3rd Quad has a U15 2nd Quad of ACGS?
SQL: SELECT "u15_3rd_quad" FROM head_of_river_queensland_2 WHERE "u15_2nd_quad" = 'acgs'

Question: Which U15 4th Quad had a U15 3rd Quad of BBC and U15 6th Quad of GT?
SQL: SELECT "u15_4th_quad" FROM head_of_river_queensland_2 WHERE "u15_3rd_quad" = 'bbc' AND "u15_6th_quad" = 'gt'

Question: Which U15 1st Quad had an Open 3rd VIII of BBC and U16 3rd VIII of BBC?
SQL: SELECT "u15_1st_quad" FROM head_of_river_queensland_2 WHERE "open_3rd_viii" = 'bbc' AND "u16_3rd_viii" = 'bbc'