CREATE TABLE table_41371 ("Party" TEXT, "Marplan" TEXT, "Gallup" TEXT, "National Opinion Polls  ( NOP ) " TEXT, "Opinion Research Centre  ( OPC ) " TEXT, "Harris" TEXT)

What is Harris, when Marplan is 1.3%
SELECT "Harris" FROM table_41371 WHERE "Marplan" = '1.3%'
SELECT "Harris" FROM "table_41371" WHERE "Marplan" = '1.3%'