CREATE TABLE table_39978 ("Species" CLOB, "Indole" CLOB, "Methyl Red" CLOB, "Voges-Proskauer" CLOB, "Citrate" CLOB)

What is the Voges-Proskauer reading for proteus mirabilis?
SELECT "Voges-Proskauer" FROM table_39978 WHERE "Species" = 'proteus mirabilis'
SELECT "Voges-Proskauer" FROM "table_39978" WHERE "Species" = 'proteus mirabilis'