Table: parl_election_2009
Columns: party
results_2004
csa_5_14_09
viavoice_5_15_09
ifop_la_croix_5_15_09
ipsos_5_16_09
opinionway_5_18_09
csa_5_20_09
ipsos_5_25_09
tns_sofres_5_26_09
opinionway_5_28_09
tns_sofres_5_28_09

Question: Which Ipsos 5/25/09 has a TNS-Sofres 5/28/09 of 20%?
SQL: SELECT "ipsos_5_25_09" FROM parl_election_2009 WHERE "tns_sofres_5_28_09" = '20%'

Question: Which TNS-Sofres 5/26/09 has an Ipsos 5/25/09 of 1%?
SQL: SELECT "tns_sofres_5_26_09" FROM parl_election_2009 WHERE "ipsos_5_25_09" = '1%'

Question: Which OpinionWay 5/18/09 has an Ipsos 5/16/09 of 11%?
SQL: SELECT "opinionway_5_18_09" FROM parl_election_2009 WHERE "ipsos_5_16_09" = '11%'

Question: Which Ipsos 5/16/09 has a TNS-Sofres 5/28/09 of 2.5%?
SQL: SELECT "ipsos_5_16_09" FROM parl_election_2009 WHERE "tns_sofres_5_28_09" = '2.5%'

Question: Which Ipsos 5/16/09 has an Ifop- La Croix 5/15/09 of 26%?
SQL: SELECT "csa_5_20_09" FROM parl_election_2009 WHERE "ifop_la_croix_5_15_09" = '26%'

Question: Which Viavoice 5/15/09 has a CSA 5/14/09 of 5%, and a TNS-Sofres 5/28/09 of 4.5%?
SQL: SELECT "viavoice_5_15_09" FROM parl_election_2009 WHERE "csa_5_14_09" = '5%' AND "tns_sofres_5_28_09" = '4.5%'