Table: pres_election_polls_2011
Columns: date
source
polling_agency
davis
gallagher
higgins
mcguinness
mitchell
norris
scallon

Question: What is the Higgins with a Scallon that is 2%?
SQL: SELECT "higgins" FROM pres_election_polls_2011 WHERE "scallon" = '2%'

Question: What is the Higgins with a Davis that is 9%?
SQL: SELECT "higgins" FROM pres_election_polls_2011 WHERE "davis" = '9%'

Question: What is the Source with a Norris that is 7%?
SQL: SELECT "source" FROM pres_election_polls_2011 WHERE "norris" = '7%'