CREATE TABLE table_75990 ("Source" CLOB, "Date" CLOB, "Goberman" CLOB, "Loera" CLOB, "Merkley" CLOB, "Neville" CLOB, "Novick" CLOB, "Obrist" CLOB, "Other/ Undecided" CLOB)

Which Goberman has a Date of april 28 april 30, 2008?
SELECT "Goberman" FROM table_75990 WHERE "Date" = 'april 28–april 30, 2008'
SELECT "Goberman" FROM "table_75990" WHERE "Date" = 'april 28–april 30, 2008'