Table: election_results_2009
Columns: constituency
winner
party
margin
runner_up_a
party_a

Question: who ended runner-up to sankar adhi?
SQL: SELECT "runner_up_a" FROM election_results_2009 WHERE "winner" = 'Sankar Adhi'

Question: which was k. annamalai´s party a?
SQL: SELECT "party_a" FROM election_results_2009 WHERE "runner_up_a" = 'K. Annamalai'