Table: head_of_river_1999
Columns: crew
year_10_1st_quad
year_10_2nd_quad
year_10_3rd_quad
year_10_4th_quad
year_10_single_scull
year_9_1st_quad
year_9_2nd_quad
year_9_3rd_quad
year_9_4th_quad
year_9_single_scull
year_8_1st_quad
year_8_2nd_quad
year_8_3rd_quad
year_8_4th_quad
year_8_single_scull

Question: In the Crews beyond 2006 what was the Year 8 1st Quads that exists in the same row that had the year 9 2nd Quads of BGGS?
SQL: SELECT "year_8_1st_quad" FROM head_of_river_1999 WHERE "year_9_2nd_quad" = 'bggs' AND "crew" > 2006

Question: For the Crew with Year 9 2nd Quads of STM, Year 9 1st Quads of SOM, and a Year 8 3rd Quads of STA what was the Year 8 1st Quads?
SQL: SELECT "year_8_1st_quad" FROM head_of_river_1999 WHERE "year_9_2nd_quad" = 'stm' AND "year_9_1st_quad" = 'som' AND "year_8_3rd_quad" = 'sta'