Table: election_polls_1970_2
Columns: party
marplan
gallup
national_opinion_polls_nop
opinion_research_centre_opc
harris

Question: What is Party, when Opinion Research Centre (OPC) is 1.5%?
SQL: SELECT "party" FROM election_polls_1970_2 WHERE "opinion_research_centre_opc" = '1.5%'

Question: What is Marplan, when Gallup is 1.5%
SQL: SELECT "marplan" FROM election_polls_1970_2 WHERE "gallup" = '1.5%'

Question: What is Opinion Research Centre (OPC), when Party is Conservative?
SQL: SELECT "opinion_research_centre_opc" FROM election_polls_1970_2 WHERE "party" = 'conservative'

Question: What is Harris, when Marplan is 1.3%
SQL: SELECT "harris" FROM election_polls_1970_2 WHERE "marplan" = '1.3%'