What category does the item ordered by Katherine Murray on 11/4/2018 in the South region belong to?
ordered by Katherine Murray refers to "Customer Name" = 'Katherine Murray'; on 11/4/2018 refers to "Order Date" = Date('2018-11-04');
SELECT DISTINCT T3.Category FROM south_superstore AS T1 INNER JOIN people AS T2 ON T1.`Customer ID` = T2.`Customer ID` INNER JOIN product AS T3 ON T3.`Product ID` = T1.`Product ID` WHERE T2.`Customer Name` = 'Katherine Murray' AND T1.`Order Date` = '2018-11-04' AND T2.Region = 'South'